About TENS

What is "TENS"?

According to the Merriam-Webster dictionary: 1) transcutaneous electrical nerve stimulation: electrical stimulation of the skin to relieve pain by interfering with the neural transmissions of signals from underlying pain receptors. 2) transcutaneous electrical nerve stimulator: a device used for TENS.

How old is TENS technology?

Some estimates date the earliest uses of TENS technology to the 16th century, and the earliest portable TENS unit available in 1974.

How does TENS help stop neck pain, reduce shoulder pain, ease joints and tension, or improve circulation?

A TENS may help because it is, as the FDA states, "TENS, To be used for temporary relief of pain associated with sore muscles and aching muscles in the shoulder, waist, back, neck, upper extremities (leg) due to strain from exercise or normal household work activities. "

What are some of the other benefits of managing pain with a 789tens TENS unit?

Some of the other benefits of managing pain with a 789tens TENS unit may include: drug-free pain management, easy to use, affordability, 789tens Lifetime Warranty, and excellent customer care.

Who uses TENS?

Some of the many users of TENS are people suffering from chronic back pain, physicians, nurses, physical therapists, occupational health therapists, fitness trainers, athletes, those recovering from injury or surgery, those needing help with workout recovery, and people suffering from stress. 

Do I need a doctor's prescription to buy or use any 789tens TENS unit?

No, doctor's prescriptions are not required for buying or using any 789tens TENS units. 

Will my medical insurance pay for my 789tens TENS unit and accessories?

Some insurance policies may cover TENS units and accessories, so check with your insurance company.

Will my Medicaid or Medicare pay for my 789tens TENS unit and accessories?

For some people, their Medicaid or Medicare may cover TENS units and accessories, so check with your agent.

TENS Safety

Are there areas on the body where I should NOT use my TENS?

Yes, areas to avoid include (and are not limited to): over the heart, on opened or closed eyes, inside the mouth, genital area, on the anus, on fingernails or toenails, cranium area, and on wounds or irritated skin.

Are there medical conditions that could prohibit me from using TENS?

Yes, conditions include (and are not limited to): pregnancy, cancers, muscle degenerative diseases, neuro degenerative diseases, heart disease, dermatological conditions.  Please first consult with a physician before using or purchasing a TENS unit.

Should I first check with my doctor before purchasing or using a TENS unit?

Even though it is not required, we highly recommend that you first consult with a physician, and ensure that it is safe for you to use TENS units. 

What should I do if my pain does not go away, or worsens, after using my TENS?

Please stop using your TENS and consult a physician immediately. 

Is it safe to use a TENS unit with my implantable cardioverter defibrillator or pacemaker?

No, please first consult with a physician before using or purchasing a TENS unit. 

Is it safe to use a TENS unit with my metal implants?

It may not be safe, so please first consult with a physician before using or purchasing a TENS unit. 

Is it safe to use my TENS unit in or near water?

No, DO NOT use any TENS units in or near water.  WARNING: It is very dangerous to use TENS units (or any electrical device) in or near water, and doing so may result in serious injury or death. 

TENS Units and Accessories

When should I change my 789tens TENS pads?

To optimize use of your TENS, we recommend that you change your TENS pads after (whichever happens first) about 100 uses, or when the pads do not stick to your skin properly.  If your TENS pads are coming off slightly easily, then you should replace them with new pads. 

Can I use my 789tens TENS pads over clothing?

No, all TENS pads must be used on bare skin that is clean and dry. 

Why do I not feel any sensation when I am using just 1 or 3 789tens TENS pads?

Our TENS pads (Mini, Standard, or Extra Large) must be used in pairs, such as 2 or 4 pads at once, otherwise they will not work properly.

Why should I moisten my 789tens TENS pads (not including Wireless TENS Pads)?

This may help to optimize the TENS pads' conductivity and longevity.

How do I clean my 789tens TENS pads?

Remove larger pieces of debris if it will not disrupt the proper use of the pads, otherwise you should replace them with new pads.

Why do I have to turn the strength level higher when using my 789tens TENS Sleeves, Gloves, Socks, or Slippers?

These accessories offer a less intense kind of sensation than the TENS pads, and it may be necessary to increase the strength when using these accessories.

Can I machine-wash or machine-dry my 789tens TENS Sleeves, Gloves, or Socks?

Yes, at your own risk, you can wash and dry your TENS garments: machine-wash on delicate cycle and in cold water, and hang dry - DO NOT machine-dry.

How do I clean my 789tens Slippers?

Brush or wipe off dirt, dust, or debris, and DO NOT use water or any liquids.  We recommend clean feet when using our Slippers.

Can I wear socks while using my 789tens Slippers?

No, our TENS Slippers must be used with bare feet that are clean and dry.

Which kind of battery does my 789tens TENS Wireless TENS Remote use?

The 789tens TENS Wireless TENS Remote uses lithium battery #CR2032.

789tens Lifetime Warranty

How do I register my 789tens Lifetime Warranty?

Your 789tens Lifetime Warranty should be registered when you complete your order.  You can also register it 1) online here, 2) by filling out and mailing in your 789tens Lifetime Warranty card, or 3) in-person with one of our 789tens retailers. 

Does the 789tens Lifetime Warranty cover the accessories that are included with my 789tens TENS unit?

No, the 789tens Lifetime Warranty only covers your 789tens TENS unit. 

What should I do when my 789tens TENS unit needs repair?

Please check out our "789tens Lifetime Warranty" page for details and instructions.  Click here for printer-friendly detailed instructions (in PDF format).

Will 789tens pay for me to ship my damaged TENS unit for repair?

No, we do not pay for your return shipping.

Will 789tens pay for me to ship my defective TENS unit for exchange?

Yes, we will credit the return shipping of your defective 789tens TENS unit under BOTH conditions: we receive notice of your defective unit within 30 days of its delivery date, and we confirm that your unit is defective.  Please check out "789tens Returns Policy" for more details.

Will 789tens pay for shipping to me, my repaired or exchanged TENS unit?

We pay for shipping repaired or exchanged TENS units within the 50 states, U.S. territories, and AFO/FPO/DPO.  For other international shipments, please check out "789tens Shipping Rates" for details.

Will my 789tens Lifetime Warranty be voided if I use my 789tens TENS unit outside of the United States or Canada?

No, there are no restrictions on where you can use your 789tens TENS unit.

Will my 789tens Lifetime Warranty be voided if I use TENS accessories from a different brand with my 789tens TENS unit?

No, you can use any brand of TENS accessories with your 789tens TENS unit.

What can void my 789tens Lifetime Warranty?

The conditions under which your 789tens Lifetime Warranty can be voided are, when your 789tens TENS unit ceases to exist (including theft), or when mandated by court or law.

789tens and the FDA

What is "FDA"?

FDA is the United States Food and Drug Administration.  Please visit www.fda.gov for more information from the FDA.

What is the difference between "FDA Approved" and "FDA Cleared"?

The main difference is that, "FDA Approved" products have been proven to be safe (by a much higher and longer standard than for "Cleared" products), and "FDA Cleared" products have been proven to be "substantially equivalent" to a product already legally marketed for the same use.  Please visit www.fda.gov for information from the FDA.

Are 789tens TENS units FDA cleared?

Yes, all 789tens TENS units are FDA-cleared.

Is 789tens registered with the FDA?

Yes, 789tens is an FDA-registered company.

789tens Reusable Instant Heat Packs

How do I activate my 789tens Reusable Instant Heat pack?

Snap, bend, or press the metal disc until the crystals are activated (it may take more than 1 attempt, especially when the pack is brand new).  When pressed correctly you will hear a clicking noise.  The pack will start to change color as it begins to heat up.

Why should I massage the crystals once my 789tens Reusable Instant Heat pack has been activated?

Massaging the crystals helps the rest of the pack to heat up more quickly, and it makes it easier to shape the pack to better fit your body.

How do I reuse my 789tens Reusable Instant Heat pack once it has been activated?

Activated packs must first be boiled (and the crystals melted), and then activated again for instant heat (or for cool, place in the refrigerator only).  Please check out "789tens Reusable Instant Heat Instructions" below for details.

After your activated heat pack cools down, it will begin to solidify.  In order to reuse the pack it must be boiled in water to turn the contents back into a liquid.  Depending on the size of the pack, this process normally takes between 5 to 25 minutes.

 

Instructions for boiling your heat pack:  

 
1. Use a nonstick pot to boil the water.  If you do not have a nonstick pot, then wrap your pack in a towel before boiling it in the pot.  If the pot is not large enough to accommodate your hardened pack as-is, then fold it into thirds (or as necessary) before wrapping or placing it in the pot.
 
2. Fill the pot with enough water to fully submerge your pack, and bring the water to a boil.  You may add the boiling water from a kettle in order to speed up the boiling process. 
 
3. Safely place your pack in the pot.  You can do this either before or as the water boils. 
 
4. Boil your pack for at least 5-30 minutes (this does not include the time it takes for the water to heat up to a boil).  Ensuring that 100% of the crystals have melted is necessary.  Smaller packs should take 5-10 minutes, larger packs 15-25 minutes to melt all the crystals.  
 
5. Turn the heat off before removing your pack from the pot.  Place it on a clean and safe surface, and allow it to cool down to a safe temperature.  If your pack was wrapped, then unwrap it before laying it to cool. 
 
6. Now you can activate your pack for instant heat, or place it in the fridge to use as a cold pack.  Do not place your pack in the freezer, and it is not microwaveable. 

 

 

How long should I boil my 789tens Reusable Instant Heat pack?

Depending on the size of your pack (and the temperature of the water), it may take 5 to more than 30 minutes to completely melt the hardened crystals.

Small heat packs (Palm, Heart, Round) normally take around 5 to 10 minutes to boil.

Larger packs (Neck & Shoulders, Long Back) normally take 10 to 20 minutes to boil.

What if I do not have a nonstick pot to boil my 789tens Reusable Instant Heat packs?

Wrap your packs in a towel, and make sure that the packs do not touch the pot directly.

How many times can I reuse my 789tens Reusable Instant Heat pack?

If used as directed, we estimate that you may be able to reuse (reactivate) your pack at least 100 times.

Can I use my 789tens Reusable Instant Heat pack for cold?

Yes, place your pack (not activated) in the refrigerator for at least 1 hour prior to using it.

Is it safe to put my 789tens Reusable Instant Heat pack in the freezer?

No, DO NOT place any packs in the freezer.  Doing so may cause the metal disc to be activated, the crystals may expand beyond the casing's limits, and the pack may burst.

Is it safe to activate my 789tens Reusable Instant Heat pack immediately after I take it out of the refrigerator?

Yes.

How should I store my 789tens Reusable Instant Heat pack?

Store your packs in a cool dry place that is not in direct sunlight, and will keep pack protected from hard or sharp piercing objects.

What should I do if my 789tens Reusable Instant Heat pack leaks or bursts?

Properly dispose of your damaged pack (and any leaked or spilled contents) in the garbage.  DO NOT dump or flush any part of your pack in toilets, drains, or waterways.  DO NOT burn or incinerate any part of your pack.

Is it safe to put my 789tens Reusable Instant Heat pack in the microwave?

No, DO NOT place any packs in the microwave, as this is very dangerous, and may cause serious injuries.

How do I clean my 789tens Reusable Instant Heat packs?

Clean packs by gently wiping with a soft and clean damp cloth (use mild soap if necessary).  DO NOT put packs in the washer, dryer, or dishwasher.

What is my 789tens Reusable Instant Heat pack filled with?

It is filled with a nontoxic sodium acetate solution.  DO NOT eat any part of your pack.

Can I carry-on my 789tens Reusable Instant Heat pack on the plane?

No, all packs should be packed with check-in luggage (even when packs are hardened).

I boiled my heat pack and it is still solid, what am I doing wrong?

The heat pack was not boiled for a long enough time.  

The heat packs must be boiled for long enough to ensure that the contents are 100% liquefied.  If the packs are removed from the boiling water too soon, they may become solid again.

If in doubt then leave the packs in the boiling water for a few extra minutes.  Small packs (heart, palm, round) normally take 5 to 10 minutes.  Larger packs (Neck & Shoulders, Long Back) normally take 10 to 20 minutes.

Once you get used to this process, it will become very easy in the future!

789tens Etc.

What does "aloha" mean?

"Aloha" is Hawai‘ian for "hello", "good-bye", "love", and "I love you".  In Hawai‘i, the meaning is unique to the beholder.

What does "Hau‘ula" mean?

"Hau‘ula" has been translated as Hawai‘ian for "red hibiscus tree".  In Hawai‘i, the meaning is unique to the beholder.

What does "kuleana" mean?

"Kuleana" is Hawai‘ian for right, duty, responsibility, or accountability.  In Hawai‘i, the meaning is unique to the beholder.

What does "mahalo" mean?

"Mahalo" is Hawai‘ian for "thank you" or "thanks".  In Hawai‘i, the meaning is unique to the beholder.

What does "ohana" mean?

"Ohana" is Hawai‘ian for "family".  In Hawai‘i, the meaning is unique to the beholder.

How do I give 789tens my feedback?

We look forward to hearing from you!  Please give us your feedback by contacting us directly through our Contact Us page, or join the 789tens Community Forum.

How do I become a retailer of 789tens products?

We would appreciate the opportunity to help you become a retailer of 789tens products!  Please Contact Us and let us know.