1What are the dimensions of the pads, and where should I apply them?
Each electrode pad measures 2" x 3". They're commonly used to relieve pain in these areas:
• Neck and shoulders: Eases tension and stiffness.
• Upper and lower back: A frequent go-to for general or localized back pain.
• Joints (knees, elbows, ankles, wrists): Helpful for arthritis, injury, or overuse.
• Arms and legs (thighs, calves): Soothes muscle soreness and aches.
• Feet: Provides foot pain relief.
2How can I extend the life of my electrode pads?
Typically around 30–40 uses, depending on your skin prep and how well you store them.
Here's how to get the most out of your TENS pads:
• Clean your skin before each use: Remove oils, lotions, and sweat so the gel stays clean.
• Wash your hands before handling pads: This helps avoid transferring dirt.
• Store pads properly: Stick them back on the plastic liner or pad holder, then seal them in an airtight bag (with the air pressed out) to keep the gel from drying out.
• Peel gently: Avoid stretching the pads when removing them — lift from the edge.
• Clean the gel occasionally: Rinse with a few drops of water, pat dry with your fingers (don't rub), and let air-dry briefly before reapplying. This helps restore tackiness.
• Replace when needed: If the gel feels dry, cracked, or no longer sticks, it's time for a new set — typically after 30–40 uses, depending on skin prep and storage.
• Avoid lotions, oils, and alcohol wipes on the pads: These will degrade the gel.
3What are the main components of the pad gel?
The main ingredients of these pads are glycerin (non-tallow), water, and poly(acrylate) copolymer. They are latex-free. We recommend checking the ingredients first if you have any known sensitivities.
4How do I get the right replacement snap-on pads?
AVCOO multi-size TENS pads are compatible with all TENS EMS machines that use the industry-standard button-connected (3.5 mm) leads.
1What modes does this unit include, what does each do, and how do I choose the right one?
This TENS unit includes 32 TENS, EMS, and Relax modes:
• TENS modes: P1–P14
• EMS modes: P1–P10
• Relax modes: P1–P8
Please refer to the mode list in the pad guide for full details. If you have any other questions, feel free to contact our customer service team — we're happy to help.
2What are some suggestions regarding usage frequency and duration?
• Session length: 15–30 minutes per session is ideal, with a maximum of 60 minutes.
• Daily frequency: 1–2 sessions per day for routine care or mild pain, and up to 3 sessions per day for more severe pain.
• Rest between sessions: Please leave at least 2 hours between each session.
3Why won't the device turn on?
1. Check the charging cable: This product cannot be used while charging. Please make sure the charging cable is unplugged before powering on.
2. Charge first: Please charge the device with a 5V adapter for at least 30 minutes, then press and hold the power button to turn it on. It should power on after charging.
3. Still not working?: Please contact our customer service team for further troubleshooting.
4Why isn't the device charging?
1. Try a different cable and adapter.
2. Make sure the charging port is fully inserted.
3. Check the device: Is there any visible damage?
4. Still not charging with multiple chargers?: Please contact our customer service team.
5Why can't I feel any current or stimulation?
1. Check the connections: Make sure the electrode pads, leads, and machine are all securely connected. Each lead should connect to two electrode pads.
2. Apply the pads fully: Press the pad flat against your skin so it makes complete contact.
3. Start at the lowest intensity: Gradually increase the intensity from the lowest setting. We don't recommend starting at a high level.
4. Try cross-testing (swap leads and pads) to rule out a bad cable or pad.
If the issue persists, please contact our customer service team.
6Why is one channel producing stimulation but the other isn't?
1. Check the intensity: This TENS unit shares the A/B mode, but the intensity is set separately. Please confirm that the intensity on each channel has been adjusted to a suitable level.
2. Cross-test the leads: Try swapping the two lead wires to see whether the issue is with a specific channel or the lead itself.
3. Still not working?: Please contact our customer service team.
7Why is the current output so weak?
1. Skin or pad condition: Oils, sweat, or aging pads can all weaken stimulation. We recommend cleaning your skin or trying a fresh pair of pads.
2. Try a different pad: Replace the pad and test again.
3. Try a different lead wire: Replace the lead and test again.
4. If the electrical stimulation is still weak, please contact customer service.
8Why is the current stinging or uncomfortable?
1. Common cause: Stinging is usually due to incomplete pad contact or intensity that's set too high.
2. Lower the intensity and make sure each pad is fully and firmly adhered to the skin.
3. Still stinging?: Try replacing the pads and lead wires.
4. If the problem persists, please contact customer service.
9Why does the stimulation feel different on both channels?
This TENS unit shares the A/B mode, but the intensity is set separately. Please confirm that both channels are set to the same intensity.
Different parts of the body naturally have different sensitivities — we recommend adjusting the pad placement to a more comparable area for a more even feel.
10Why do I feel like it's not working after using it?
1. Adjust to your body: TENS effectiveness depends on pad placement, mode, intensity, and your individual response. We recommend trying different modes and adjusting the pad placement.
2. Still not working?: Please contact our customer service team.
11Why are the pads not sticking?
1. Please use after cleansing your skin.
2. It is recommended to apply the pads to a flat, dry area with little hair, avoiding application to joints or bends.
3. After use, reattach the pads to the protective film or place it on the pad board and store it in a sealed bag.
12Why does the adhesion of the pads decrease after a few uses?
1. The pads are consumables; their adhesiveness decreases with each use.
2. Storage methods and skin cleanliness affect their lifespan. Generally, they can be used 30-40 times.
13Why did my TENS unit stop working mid-session?
1. Please confirm that the device has reached the set time.
2. Check if the pads/wires are loose.
3. If the problem persists, please contact customer service for assistance.
14The intensity keeps resetting to zero mid-session — what should I do?
Please try these:
1. It is suggested to check whether the connection between the pads, lead wire and the machine; One lead wire should connect with two pads and then connect with the machine.
2. Please check if the pads were attached to the skin in the usage area well. If the connection is loose, the machine will not feel the load, the. intensity can not be increased successfully and will get back to zero.
3. If the above ways can not yet help resolve it, please contact our customer service
15Is this unit dual channel?
There are two channels. Channels A and B can each be connected to a different pad group. The two channels share the same mode, but the intensity is set separately for each.
16How can I prevent skin irritation?
Here are a few simple tips:
• Clean your skin first: Use mild soap and water (no alcohol or lotion), and dry thoroughly before applying pads.
• Use fresh pads: Old, dried-out gel can cause uneven current and redness.
• Rotate placement: Avoid using the same spots every session — let your skin rest.
• Avoid sensitive areas: Never place pads over rashes, cuts, eczema, broken, or irritated skin.
• Lower the intensity if needed: A sharp burning or prickling feeling often means too much current or poor contact.
• Remove pads at the first sign of irritation: If itching or redness appears, take the pads off and apply a mild moisturizer once the skin has cooled.
• Keep sessions short: Sessions longer than 30–40 minutes can increase irritation risk — please follow the recommended times.
17How do I find the right replacement lead wires?
1. The cable specs are 2.35mm DC jack with 2–3.5mm snap connectors.
2. You can search for compatible cables on Amazon.
3. If you have any questions or can't find a suitable cable, please reach out to our customer service team.
1What modes does this unit include, what does each do, and how do I choose the right one?
This TENS unit includes both TENS and EMS modes:
• TENS: P1–P17
• EMS: P18–P30
Please refer to the mode list in the pad guide for full details. If you have any other questions, feel free to contact our customer service team — we're happy to help.
2What are some suggestions regarding usage frequency and duration?
• Session length: 15–30 minutes per session is ideal, with a maximum of 60 minutes.
• Daily frequency: 1–2 sessions per day for routine care or mild pain, and up to 3 sessions per day for more severe pain.
• Rest between sessions: Please leave at least 2 hours between each session.
3Why won't the device turn on?
1. Check the charging cable: This product cannot be used while charging. Please make sure the charging cable is unplugged before powering on.
2. Charge first: Please charge the device with a 5V adapter for at least 30 minutes, then press and hold the power button to turn it on. It should power on after charging.
3. Still not working?: Please contact our customer service team for further troubleshooting.
4Why isn't the device charging?
1. Try a different cable and adapter.
2. Make sure the charging port is fully inserted.
3. Check the device: Is there any visible damage?
4. Still not charging with multiple chargers?: Please contact our customer service team.
5Why can't I feel any current or stimulation?
1. Check the connections: Make sure the electrode pads, leads, and machine are all securely connected. Each lead should connect to two electrode pads.
2. Apply the pads fully: Press the pad flat against your skin so it makes complete contact.
3. Start at the lowest intensity: Gradually increase the intensity from the lowest setting. We don't recommend starting at a high level.
4. Try cross-testing (swap leads and pads) to rule out a bad cable or pad.
If the issue persists, please contact our customer service team.
6Why is one channel producing stimulation but the other isn't?
1. Check the intensity: On the TU1130, channels A and B share the same intensity setting. Please confirm that the intensity has been adjusted to a suitable level.
2. Cross-test the leads: Try swapping the two lead wires to see whether the issue is with a specific channel or the lead itself.
3. Still not working?: Please contact our customer service team.
7Why is the current output so weak?
1. Skin or pad condition: Oils, sweat, or aging pads can all weaken stimulation. We recommend cleaning your skin or trying a fresh pair of pads.
2. Try a different pad: Replace the pad and test again.
3. Try a different lead wire: Replace the lead and test again.
4. If the electrical stimulation is still weak, please contact customer service.
8Why is the current stinging or uncomfortable?
1. Common cause: Stinging is usually due to incomplete pad contact or intensity that's set too high.
2. Lower the intensity and make sure each pad is fully and firmly adhered to the skin.
3. Still stinging?: Try replacing the pads and lead wires.
4. If the problem persists, please contact customer service.
9Why does the stimulation feel different on both channels?
On the TU1130, channels A and B share the same intensity, so they should feel the same strength. Different parts of the body naturally have different sensitivities, though — we recommend adjusting the pad placement to a more comparable area for a more even feel.
10Why do I feel like it's not working after using it?
1. Adjust to your body: TENS effectiveness depends on pad placement, mode, intensity, and your individual response. We recommend trying different modes and adjusting the pad placement.
2. Still not working?: Please contact our customer service team.
11Why are the pads not sticking?
1. Please use after cleansing your skin.
2. It is recommended to apply the pad to a flat, dry area with little hair, avoiding application to joints or bends.
3. After use, reattach the pad to the protective film or place it on the pad board and store it in a sealed bag.
12Why does the adhesion of the pads decrease after a few uses?
1. The pads are consumables; their adhesiveness decreases with each use.
2. Storage methods and skin cleanliness affect their lifespan. Generally, they can be used 30-40 times.
13Why did my TENS unit stop working mid-session?
1. Please confirm that the device has reached the set time.
2. Check if the pads/wires are loose.
3. If the problem persists, please contact customer service for assistance.
14The intensity keeps resetting to zero mid-session — what should I do?
Please try these:
1. It is suggested to check whether the connection between the pads, lead wire and the machine; One lead wire should connect with two pads and then connect with the machine.
2. Please check if the pads were attached to the skin in the usage area well. If the connection is loose, the machine will not feel the load, the. intensity can not be increased successfully and will get back to zero.
3. If the above ways can not yet help resolve it, please contact our customer service
15Is this unit dual channel?
There are two channels. Channels A and B can each be connected to a different pad group, but the intensity and mode of both channels are adjusted together.
16How can I prevent skin irritation?
Here are a few simple tips:
• Clean your skin first: Use mild soap and water (no alcohol or lotion), and dry thoroughly before applying pads.
• Use fresh pads: Old, dried-out gel can cause uneven current and redness.
• Rotate placement: Avoid using the same spots every session — let your skin rest.
• Avoid sensitive areas: Never place pads over rashes, cuts, eczema, broken, or irritated skin.
• Lower the intensity if needed: A sharp burning or prickling feeling often means too much current or poor contact.
• Remove pads at the first sign of irritation: If itching or redness appears, take the pads off and apply a mild moisturizer once the skin has cooled.
• Keep sessions short: Sessions longer than 30–40 minutes can increase irritation risk — please follow the recommended times.
17How do I find the right replacement lead wires?
1. The cable specs are 2.35mm DC jack with 2–3.5mm snap connectors.
2. You can search for compatible cables on Amazon.
3. If you have any questions or can't find a suitable cable, please reach out to our customer service team.
1What modes does this unit include, what does each do, and how do I choose the right one?
The AVCOO 3-in-1 TENS Unit Muscle Stimulator comes with 24 pre-programmed modes:
• TENS: P1–P16
• EMS: P17–P20
• Relax: P21–P24
Please refer to the mode list in the pad guide for full details. If you have any other questions, feel free to contact our customer service team — we're happy to help.
2What are some suggestions regarding usage frequency and duration?
• Session length: 15–30 minutes per session is ideal, with a maximum of 60 minutes.
• Daily frequency: 1–2 sessions per day for routine care or mild pain, and up to 3 sessions per day for more severe pain.
• Rest between sessions: Please leave at least 2 hours between each session.
3Why won't the device turn on?
1. Check the charging cable: This product cannot be used while charging. Please make sure the charging cable is unplugged before powering on.
2. Charge first: Please charge the device with a 5V adapter for at least 30 minutes, then press and hold the power button to turn it on. It should power on after charging.
3. Still not working?: Please contact our customer service team for further troubleshooting.
4Why isn't the device charging?
1. Try a different cable and adapter.
2. Make sure the charging port is fully inserted.
3. Check the device: Is there any visible damage?
4. Still not charging with multiple chargers?: Please contact our customer service team.
5Why can't I feel any current or stimulation?
1. Check the connections: Make sure the electrode pads, leads, and machine are all securely connected. Each lead should connect to two electrode pads.
2. Apply the pads fully: Press the pad flat against your skin so it makes complete contact.
3. Start at the lowest intensity: Gradually increase the intensity from the lowest setting. We don't recommend starting at a high level.
4. Try cross-testing (swap leads and pads) to rule out a bad cable or pad.
If the issue persists, please contact our customer service team.
6Why is one channel producing stimulation but the other isn't?
1. Check the intensity: On the TA2224C, channels A and B have their intensity set separately. Please confirm that the intensity has been adjusted to a suitable level on each channel.
2. Cross-test the leads: Try swapping the two lead wires to see whether the issue is with a specific channel or the lead itself.
3. Still not working?: Please contact our customer service team.
7Why is the current output so weak?
1. Skin or pad condition: Oils, sweat, or aging pads can all weaken stimulation. We recommend cleaning your skin or trying a fresh pair of pads.
2. Try a different pad: Replace the pad and test again.
3. Try a different lead wire: Replace the lead and test again.
4. If the electrical stimulation is still weak, please contact customer service.
8Why is the current stinging or uncomfortable?
1. Common cause: Stinging is usually due to incomplete pad contact or intensity that's set too high.
2. Lower the intensity and make sure each pad is fully and firmly adhered to the skin.
3. Still stinging?: Try replacing the pads and lead wires.
4. If the problem persists, please contact customer service.
9Why does the stimulation feel different on both channels?
On the TA2224C, channels A and B share the same mode, but the intensity is set separately. Please confirm that both channels are set to the same intensity.
Different parts of the body naturally have different sensitivities — we recommend adjusting the pad placement to a more comparable area for a more even feel.
10Why do I feel like it's not working after using it?
1. Adjust to your body: TENS effectiveness depends on pad placement, mode, intensity, and your individual response. We recommend trying different modes and adjusting the pad placement.
2. Still not working?: Please contact our customer service team.
11Why are the pads not sticking?
1. Please use after cleansing your skin.
2. It is recommended to apply the pads to a flat, dry area with little hair, avoiding application to joints or bends.
3. After use, reattach the pads to the protective film or place it on the pads board and store it in a sealed bag.
12Why does the adhesion of the pads decrease after a few uses?
1. The pads are consumables; their adhesiveness decreases with each use.
2. Storage methods and skin cleanliness affect their lifespan. Generally, they can be used 30-40 times.
13Why did my TENS unit stop working mid-session?
1. Please confirm that the device has reached the set time.
2. Check if the pads/wires are loose.
3. If the problem persists, please contact customer service for assistance.
14The intensity keeps resetting to zero mid-session — what should I do?
Please try these:
1. It is suggested to check whether the connection between the pads, lead wire and the machine; One lead wire should connect with two pads and then connect with the machine.
2. Please check if the pads were attached to the skin in the usage area well. If the connection is loose, the machine will not feel the load, the. intensity can not be increased successfully and will get back to zero.
3. If the above ways can not yet help resolve it, please contact our customer service
15Is this unit dual channel?
There are two channels. Channels A and B can each be connected to a different pad group. The two channels share the same mode, with the intensity set separately for each.
16How can I prevent skin irritation?
Here are a few simple tips:
• Clean your skin first: Use mild soap and water (no alcohol or lotion), and dry thoroughly before applying pads.
• Use fresh pads: Old, dried-out gel can cause uneven current and redness.
• Rotate placement: Avoid using the same spots every session — let your skin rest.
• Avoid sensitive areas: Never place pads over rashes, cuts, eczema, broken, or irritated skin.
• Lower the intensity if needed: A sharp burning or prickling feeling often means too much current or poor contact.
• Remove pads at the first sign of irritation: If itching or redness appears, take the pads off and apply a mild moisturizer once the skin has cooled.
• Keep sessions short: Sessions longer than 30–40 minutes can increase irritation risk — please follow the recommended times.
17How do I find the right replacement lead wires?
1. The cable specs are 2.35mm DC jack with 2–3.5mm snap connectors.
2. You can search for compatible cables on Amazon.
3. If you have any questions or can't find a suitable cable, please reach out to our customer service team.
General FAQs selected
TENS Unit
User Manuals
No manuals available.
Support Videos
No support videos available.
Frequently Asked Questions
1What are some suggestions regarding usage frequency and duration?
Session length: 15–30 minutes per session is ideal, with a maximum of 60 minutes.
Daily frequency: 1–2 sessions per day for routine care or mild pain, and up to 3 sessions per day for more severe pain.
Rest between sessions: Please leave at least 2 hours between each session.
2Where should I place the electrode pads?
You'll find placement instructions in the user manual and pads guide. If anything is still unclear, please contact us at support@avcoo.com.
3How long does the battery last on a full charge?
On average, AVCOO TENS units take 2–4 hours to fully charge. Battery life will vary depending on session length, intensity, and frequency of use.
4Which modes work best for back pain?
Recommended modes for specific areas are listed in the user manual and pads guide. If you have any other questions, please contact us at support@avcoo.com.
5How can I extend the life of my electrode pads?
Here's how to get the most out of your TENS pads:
Clean your skin before each use: Remove oils, lotions, and sweat so the gel stays clean.
Wash your hands before handling pads: This helps avoid transferring dirt.
Store pads properly: Stick them back on the plastic liner or pad holder, then seal them in an airtight bag (with the air pressed out) to keep the gel from drying out.
Peel gently: Avoid stretching the pads when peeling them — lift from the edge.
Clean the gel occasionally: Rinse with a few drops of water, pat dry with your fingers (don't rub), and let air-dry briefly before reapplying. This helps restore tackiness.
Replace when needed: If the gel feels dry, cracked, or no longer sticks, it's time for a new set — typically after 30–40 uses, depending on skin prep and storage.
Avoid lotions, oils, and alcohol wipes on the pads: These will degrade the gel.
6How long do the electrode pads last?
Typically around 30–40 uses, depending on your skin prep and how well you store them.
7How to set the proper intensity?
For your first use, set the intensity between levels 1–5. If it feels too gentle after 1–2 minutes, gradually increase the level until you find the setting that feels most comfortable for you.
8Can I use it while it's charging?
For your safety, the device is designed not to operate while charging. If you'd like to use it, please unplug the cable and power it on first.
9Can I use it while sleeping?
We generally don't recommend it. Here's why:
Pads can shift: You might roll over and loosen the pads, causing uneven current or hot spots that can burn the skin.
You won't feel it in time: Discomfort or irritation may not wake you, so you can't adjust or turn it off quickly.
Overstimulation risk: Hours of continuous use can overstimulate your nerves and irritate your skin.
Auto-shutoff isn't foolproof: Most devices have a 20–30 minute auto-shutoff, but if the device restarts or runs too long while you sleep, it can be risky.
If you really need to use it overnight (for chronic pain, for example), use a unit with a built-in sleep mode, set a short timer (15–20 minutes), and stick to low intensity. Always check your device manual first — many explicitly warn against use during sleep.
10How can I prevent skin irritation?
Here are a few simple tips:
Clean your skin first: Use mild soap and water (no alcohol or lotion), and dry thoroughly before applying pads.
Use fresh pads: Old, dried-out gel can cause uneven current and redness.
Rotate placement: Avoid using the same spots every session — let your skin rest.
Avoid sensitive areas: Never place pads over rashes, cuts, eczema, broken, or irritated skin.
Lower the intensity if needed: A sharp burning or prickling feeling often means too much current or poor contact.
Remove pads at the first sign of irritation: If itching or redness appears, take the pads off and apply a mild moisturizer once the skin has cooled.
Keep sessions short: Sessions longer than 30–40 minutes can increase irritation risk — please follow the recommended times.
11Can I use it while walking around?
Yes, with a few precautions. Many TENS units are portable and battery-operated, so they're great for use on the go:
Make sure the electrodes are firmly attached so they don't peel off.
Secure the lead wires with a clip or under your clothing to avoid tugging.
Keep the device in a pocket or on a belt clip.
Avoid sudden movements that could shift the pads and cause uneven stimulation.
Important: Do not use it while driving or operating machinery — it's a distraction.
12Does it come with a storage bag?
Yes, all of AVCOO TENS units come with a storage bag.
13How do I charge it?
Simply use the included charging cable with your own 5V/1A USB charger.
14What's the difference between a wired and a wireless TENS machine?
Here's a quick comparison:
Wired TENS devices: Connected via wires, they're more affordable but limit your freedom of movement.
Wireless TENS devices: Connected via Bluetooth, they offer more freedom, a more discreet look, and smarter features — but they tend to cost a bit more.
15What are the TSA regulations for TENS units?
Here's what you need to know:
TSA allows TENS devices in both carry-on and checked bags.
TENS devices with lithium batteries must be carried on (not checked).
At security, we recommend removing the TENS device from your bag and proactively letting the officer know.
The final decision is always at the discretion of the on-site security personnel.
16Can I use different modes on each channel?
It depends on the type of device: Type 1: Both channels share the same mode and intensity.
Type 2: Both channels share the same mode, but intensity can be adjusted separately. Type 3: Both the mode and intensity can be set independently for each channel.
17What areas of the body can I use it on?
TENS is commonly used to relieve pain in these areas:
Neck and shoulders: Eases tension and stiffness.
Upper and lower back: A frequent go-to for general or localized back pain.
Joints (knees, elbows, ankles, wrists): Helpful for arthritis, injury, or overuse.
Arms and legs (thighs, calves): Soothes muscle soreness and aches.
Feet: Provides foot pain relief.
18Can this device be used on the neck?
Please be very careful — certain areas should never be used with electrode pads, as it can cause serious injury:
Head and face: Never place pads on your head, face, temples, eyes, or mouth.
Neck (front and sides): Avoid placing pads here, as it can affect your breathing, heart rhythm, or blood pressure.
Chest and heart area: Never place pads on your chest near the heart, or across your chest and back at the same time.
Open wounds or irritated skin: Never use pads on wounds, rashes, infections, swelling, or broken skin.
Numb areas: Avoid placing pads on skin with reduced or no sensation, since you won't feel if the stimulation gets too intense.
Over medical implants: Don't place pads directly over metal implants, or near a pacemaker or other implanted electronic device.
19How do I find the right replacement pads?
The snap-on pads are compatible with 3.5mm button lead wires.
You can search for compatible electrode pads on Amazon.
We sell replacement pads separately on Amazon — search for "TENS Unit Replacement Pads, Long-Lasting Snap Electrodes for 50 Uses per Pad, Latex-Free TENS Pads Set Compatible with TENS EMS Devices Using 3.5mm Button Lead Wires."
If you have any questions or can't find a suitable pad, please reach out to our customer service team.
20How do I find the right replacement lead wires?
The cable specs are 2.35mm DC jack with 2–3.5mm snap connectors.
You can search for compatible cables on Amazon.
If you have any questions or can't find a suitable cable, please reach out to our customer service team.
21How do I get a pads holder?
Here's what to know:
We don't sell pad holders separately.
After use, you can store the pads on the holder (if you already have one) or on the protective film that came with the pads.
If you need a pads holder, please contact our customer service team.
22What should I do if I receive a product that looks like it's been resold?
Here's what to do:
When you receive the package, check whether the box is sealed with shrink wrap and whether the tear-open tab is intact.
Please contact our customer service team with the packaging condition and photos of the product — we'll help you find the right solution.
23The screen turns on, but there's no output — what should I do?
Please try these steps:
Inspect the wires, plugs, and connectors: Stop using the device if anything is damaged, cracked, or exposed.
Secure the wire connections: Insert plugs straight in (vertically or horizontally) — avoid angled force.
Check the pads: Make sure the pads are fully adhered to your skin, and that each wire is connected to two pads.
Increase the current gradually: Ramp up the intensity slowly to a comfortable level.
24The intensity keeps resetting to zero mid-session — what should I do?
Please try these:
It is suggested to check whether the connection between the pads, lead wire and the machine; One lead wire should connect with two pads and then connect with the machine.
Please check if the pads were attached to the skin in the usage area well. If the connection is loose, the machine will not feel the load, the. intensity can not be increased successfully and will get back to zero.
If the above ways can not yet help resolve it, please contact our customer service
25Why did my TENS unit stop working mid-session?
If the unit suddenly stops working, please try the following:
Check the pads: Has a pad fallen off?
Check the timer: Has the session timer run out?
Check the battery: Is the battery low?
Check the wires: Is any wire loose or disconnected?
Electrode Pads
User Manuals
No manuals available.
Support Videos
No support videos available.
Frequently Asked Questions
1How can I extend the life of my electrode pads?
Here's how to get the most out of your TENS pads:
Clean your skin before each use: Remove oils, lotions, and sweat so the gel stays clean.
Wash your hands before handling pads: This helps avoid transferring dirt.
Store pads properly: Stick them back on the plastic liner or pad holder, then seal them in an airtight bag (with the air pressed out) to keep the gel from drying out.
Peel gently: Avoid stretching the pads when removing them — lift from the edge.
Clean the gel occasionally: Rinse with a few drops of water, pat dry with your fingers (don't rub), and let air-dry briefly before reapplying. This helps restore tackiness.
Replace when needed: If the gel feels dry, cracked, or no longer sticks, it's time for a new set — typically after 30–40 uses, depending on skin prep and storage.
Avoid lotions, oils, and alcohol wipes on the pads: These will degrade the gel.
2How long do the replacement pads last?
Typically around 30–40 uses, depending on your skin prep and how well you store them.
3How do I get the right replacement snap-on pads?
AVCOO multi-size TENS pads are compatible with all TENS EMS machines that use the industry-standard button-connected (3.5 mm) leads.
4What should I do if I have a skin reaction to the pads?
Here's how to help prevent skin irritation:
Clean your skin first: Use mild soap and water (no alcohol or lotion), and dry thoroughly before applying pads.
Use fresh pads: Old, dried-out gel can cause uneven current and redness.
Rotate placement: Avoid using the same spots every session — let your skin rest.
Avoid sensitive areas: Never place pads over rashes, cuts, eczema, broken, or irritated skin.
Try hypoallergenic pads if needed: Some brands offer gentler adhesives for sensitive skin.
Lower the intensity if needed: A sharp burning or prickling feeling often means too much current or poor contact.
Remove pads at the first sign of irritation: If itching or redness appears, take the pads off and apply a mild moisturizer once the skin has cooled.
Keep sessions short: Sessions longer than 30–40 minutes can increase irritation risk — please follow the recommended times.
5What areas of the body can I use the pads on?
TENS is commonly used to relieve pain in these areas:
Neck and shoulders: Eases tension and stiffness.
Upper and lower back: A frequent go-to for general or localized back pain.
Joints (knees, elbows, ankles, wrists): Helpful for arthritis, injury, or overuse.
Arms and legs (thighs, calves): Soothes muscle soreness and aches.
Feet: Provides foot pain relief.
6Can these pads be used on the neck?
Please be very careful — certain areas should never be used with electrode pads, as it can cause serious injury:
Head and face: Never place pads on your head, face, temples, eyes, or mouth.
Neck (front and sides): Avoid placing pads here, as it can affect your breathing, heart rhythm, or blood pressure.
Chest and heart area: Never place pads on your chest near the heart, or across your chest and back at the same time.
Open wounds or irritated skin: Never use pads on wounds, rashes, infections, swelling, or broken skin.
Numb areas: Avoid placing pads on skin with reduced or no sensation, since you won't feel if the stimulation gets too intense.
Over medical implants: Don't place pads directly over metal implants, or near a pacemaker or other implanted electronic device.
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