How many uses can I get from the pads?

An average user will get approximately 10-15 uses per pack of the electrodes included with the Twin Stim III, depending on how frequently they are used and for how long, as well as the user's skin type. Once the adhesive gel wears off, you can simply discard the electrodes and begin with a new pack of pads, but note that each unit comes standard with only one pack of four individual electrodes.

Is this device FDA approved?

Yes, the InTENSity Twin Stim III is FDA 510K-approved.

Are you able to customize/change the TENS and EMS settings to your own preferences?

YES! The Twin Stim III has 4 different adjustable modes for TENS, and 3 different adjustable modes for EMS, that can each be set to your own preference.

Are you able to use the EMS and TENS modes at the same time with this unit? Or is it one mode or the other and you can only switch between the two modes?

The Twin Stim III only allows a user to run a TENS therapy treatment, OR EMS, at one time, not both simultaneously. You can only switch from one or the other.

Can you use the AC adapter with a normal battery in the unit at the same time? Will it drain the battery while using the AC adapter?

Yes, you can use the unit with the AC Adapter, while a battery is inside the device as well. If plugged in, the AC Adapter will simply bypass the battery and power the device that way.

I travel overseas a lot. Is the unit/AC adaptor dual voltage so that it can be used overseas at 220v?

Yes! The AC Adapter for our InTENSity devices are 120v/240v, so they may indeed be used overseas with a 220v outlet.

What unit and accessories should I get for Tennis Elbow? What size pads, etc.?

Unfortunately, since we do not staff doctors here, we can not suggest specific electrotherapy treatments. We highly recommend first consulting with a doctor/medical professional about your particular case, and if they recommend an electrotherapy treatment for you, such as TENS, EMS, Interferential, Russian Stim, etc., then we can certainly better assist in helping you select the right device for your needs.

Can this unit be used on the face for TMJ?

It is generally not recommended to use an electrotherapy treatment on the face, but please always consult with a doctor/medical professional prior to considering such a treatment, to see if it is right for you. For TMJ, you may also want to ask specifically about Microcurrent vs. TENS vs. EMS.

Does this unit come with electro sticky pads?

Yes, every electrotherapy device we carry comes standard with a pack of 4 electrodes inside of the carrying case to get you started. You can refer to the Product Description on this page to see all items/accessories that come included in each package. We always recommend that you consider stocking up though whenever purchasing a new unit since the electrodes will be the #1 thing you will ever have to replace in time.

Is this unit recommended for wrist and finger extension post stroke?

We recommend first consulting with a doctor/trained medical professional to see if an electrotherapy treatment such as TENS or EMS would be a good fit for your particular case. If so, then all we can do is help provide more technical sort of information as it relates to our items. Feel free to browse our selection, and if you have any specific questions, you can always give us a call or send us an email and we will be happy to assist further in any way we can.

EMS stands for Electrical Muscle Stimulation. You should always consult with a doctor/medical professional first to see if an electrotherapy treatment, such as EMS, is right for you.

Does this unit have a belt clip on the back?

Yes, each unit comes standard with a removable belt clip attached.

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Home > TENS & Electrotherapy > InTENSity Devices > InTENSity Twin Stim III Digital TENS & EMS Combo Unit + Free AC Adapter Included

Each package includes everything needed to begin therapy right away!

InTENSity Twin Stim III Digital TENS & EMS Combo Unit + Free AC Adapter Included

Part Number:

DI3717

Availability:

In Stock

On sale: $44.95

174 Review(s)

Instruction Manual:Click Here
Quick Start Guide:Click Here
New Model Available:Click Here

Questions about this item? Ask here.

(See 26 Questions)

Quantity

Quantity Discount Pricing

Quantity
Price
6 - 31
$41.95
32 - 63
$39.95
64 - 95
$37.95
96+
$34.95

Description
Customer Reviews
Questions and Answers

The InTENSity Twin Stim™ III is a portable electrotherapy device featuring two therapeutic modes: TENS & EMS therapy, which are used for pain relief and muscle stimulation. The unit is among the upper echelon of pain relief devices, with a maximum output of 105mA, and it also comes standard with an AC Adapter and removable belt clip for easy, at-home use and convenience.

Relieve your pain by using the TENS Mode.

TENS is a non-invasive, drug free method to control your pain by sending tiny electrical impulses through the skin. In many cases, this stimulation will greatly reduce or eliminate pain.

Strengthen your muscles by using the EMS Mode.

EMS is widely used in hospitals and sports clinics to treat muscle injuries, to re-educate paralyzed muscles, and to prevent atrophy in affected muscles.

Product Features & Specifications:

Simple-to-operate, portable electrotherapy device for pain management
Unit combines TENS & EMS therapy for optimal treatment
Channels: Dual Channel
Pulse Amplitude: Adjustable, 0-105 mA
Voltage: Constant Current, 100-240V (AC Adapter)
Pulse Rate: Adjustable, from 1 to 150 Hz
Pulse Width: Adjustable, from 50 to 300 microseconds, 10µS/step
Wave Form:

TENS: Mono-phasic Square Pulse
EMS: Mono-phasic Square Pulse

Power Source: 1x 9-volt Battery, or Free A/C Power Adapter included for home use.
Timer: Adjustable in 1-minute increments between 1 and 60 minutes or Continuous. Treatment time counts down automatically.
Dimensions: 4.5" x 2.55" x 0.9"
Weight: 0.28 lb with battery
1 Year Manufacturer Warranty
Package includes everything needed to start using the device right away:

Twin Stim III unit
45" Lead Wires
1x package of 4x high quality Self-Adhesive Electrodes
1x 9V Battery
A/C Power Adapter
Hard Plastic Carrying Case
Instruction Booklet

Electrotherapy Programs:

4 TENS Modes:

Burst

Burst Rate adjustable from 0.5 - 5Hz, pulse width from 50-300µS, frequency fixed at 10Hz

Normal

Continuous stimulation with adjustable pulse rate & width

Pulse Width Modulation Mode (Modulation 1)

Pulse width decreases to 60% in one cycle, and increases back to original value in following cycle.
Pulse rate, pulse width, and cycle time are adjustable.

Pulse Rate Modulation Mode (Modulation 2)

Pulse Rate decreases to 60% in one cycle, and increases back to original value in following cycle.
Pulse rate, pulse width, and cycle time are adjustable.

EMS Mode Specs

Ramp Time:

Adjustable from 1-6 seconds.
Determines the time to reach set output level from zero, and from set output level to zero.

On / Off Time:

On time controls contraction time, adjustable from 1-60 seconds.
Off time controls relaxation time, adjustable from 0-60 seconds.
3 EMS Modes:

Synchronous (S)

Synchronized stimulation of 2 channels.
Ramp duration, ramp up, ramp down, pulse rate, & pulse width are all adjustable.

Asynchronous/Alternate (A)

As per Synchronous Mode except that stimulation of Channel 2 occurs when contraction of Channel 1 is complete.

Delay (D)

As per Synchronous Mode except that stimulation of Channel 2 begins after adjustable delay after Channel 1 stimulation begins.

View All Reviews

This product has been very effective in relieving pain when other options have not worked. I am very thankful for the pain relief.

Did you find this helpful?

Reviewed by: Lynda Goodwin from Oregon . on 7/10/2021

We love this equipment. My wife has weak wrists and was in constant pain, using copper gloves to support her wrists. But with the TENS she now only uses the cloves at her repetitive motion job.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: john dixon from ocala. on 5/23/2021

My new Tens unit

Several years ago, my back surgeon at Cedars-Sinai hospital recommended I get a tens unit for chronic back pain following major surgery, which I did for many years, off and on. Then came a need recently for a flair up of pain and I dug out the old unit. It had been stored too long I guess and did not function as well. I ordered your unit, received it promptly and use it when ever I feel the need for relief! Works great, you can increase or lower the intensity easily and I am very pleased to have a very good product handy when the need for relaxation arises. It is also very handy to be able to be mobile and worn everywhere as you keep a busy schedule. You do not have to recline or be stationary to use. Love it!!!

Did you find this helpful? 6 of 6 Found Helpful

Reviewed by: F Louise Smith from Apple Valley. on 4/9/2021

Tens / ems unit

Excellent product. Works great for my herniated disks. My wife uses it also for her neck. Great device. Don’t hesitate

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Bikk from Pa. on 2/9/2021

Bill60

Excellent product, since I have received for Christmas I use it 3 - 4 times per week. It clearly helps those sore muscles heal quickly.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Bill Tully from Florida . on 1/12/2021

Mrs

I am a nurse practitioner. This product was recommended to me by a patient with chronic back pain. It was recommended to him by his neurologist. I ordered one for my husband for his hip pain, but after trying it on my neck, I use it more than he does. The instruction book is difficult to navigate but we have figured out how to use the tens portion and it is amazing. It is well worth the investment.

Did you find this helpful? 6 of 6 Found Helpful

Reviewed by: Donna from Illinois. on 1/8/2021

Mr.

Been using Tens and Ems stimulator for about a month, it does what ie says it does. I may not be using it to it fullest but at this point i'm happy with it.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Ronald from Sarasota. on 12/27/2020

Love it!

I love my TENS unit. It does wonders!

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: Shirl Hagene from Sparta. on 11/30/2020

Highly Satisfied Customer

I ordered the TENSPRO unit for myself due to my injury/post surgery and I was impressed with the fast delivery, however my product came defective and so I called and they just asked me few questions about the product and send me the replacement. I am happy with the replacement as it works perfectly fine. I ordered another TENSPRO for my mom and there was no problem at all.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Mary from Las Vegas. on 11/28/2020

Patient, former biomedical technologist

My physical therapist recommended this specific model. Well, as an old biomed tech I had to do my own homework and check out all the other models and other suppliers. Spent hours looking carefully at all the available data. Bottom line- I don't see how you could do better than this unit for basic TENS. The EMS mode is a very nice option to have as well, though I personally haven't needed it. This unit has the perfect amount of settings and options. It is well designed and efficient. My PT knew exactly how to get his patients the best device at an unbelievably low price. Would absolutely recommend this to others.

Did you find this helpful? 9 of 9 Found Helpful

Reviewed by: SJ Bryant from Idaho, USA. on 11/21/2020

Ten Pro

I have been dealing with back issues for most of my adult life. In the past 2 years things have gotten really bad. I have been to therapy, had shots , taken meds, done chiropractic care. Thie ten pro is similar to what my chiropractic uses. I love it !! It takes away pain and I feel is helping me heal.

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: Doreen from New Fairfield Ct. on 10/13/2020

Excellent

This product exceeded my expectations. My loved ones have purchased their own on the strength of its ease of use and consistent experience.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Nate from San Francisco. on 8/7/2020

We are extremely satisfied with this purchase. My wife had broken her upper arm bone and while rehab helps but to get the relief from pain, she uses this machine all the time. And it works!

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: DIlip Joshi from Livonia. on 7/23/2020

Excellent Rehabilitation aid for re engaging hand function after a stroke , bought the tens three for my wife , its early days yet but there is a marked improvement and she is able to flex her fingers and hold items , still with a week grip but its a vast improvement and thanks to the Specialist who has put instructions on YouTube , the future looks bright . The ramp function or the rate at which the power builds up and falls is particularly good and controllable , a function not readily available on a vast number of Tens machines which generally have set programs and limited control .

Did you find this helpful? 11 of 11 Found Helpful

Reviewed by: Paul Hogan from United Kingdom. on 7/20/2020

Customer

I bought this for my dad who has moderate to severe foot pain related to Type 2 Diabetes. The device has helped ease his pain and he loves it.

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: Rebekah from Ohio. on 7/18/2020

Great purchase!!!!

Absolutley love this unit!!! I am on my 3rd battery already because it stays on my back! I would recommend till anyone who is experiencing nerve pain in their back.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Curtis from Albertville. on 7/10/2020

Business owner

Excellent products. Excellent price. Quick shipping

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: dannielle from NM. on 7/7/2020

Care partner

As advertised,works great shipping was sooner than expected

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Robert from Oregon. on 6/13/2020

Ms.

The price was great and it's a great little unit. Shipping was quick. Totally recommended.

Did you find this helpful? 6 of 6 Found Helpful

Reviewed by: Lisa Sara from Schenevus NY . on 6/6/2020

Works surprisingly well

I was shocked it works so good .for years I've had painful leg swelling in the morning when I wake up l used tens unit on N setting for a hour a day no more swelling no more pain.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Arpel Boyd from Greensboro. on 6/1/2020

Worth it

It got shipped really fast. I purchased it for my mom. She had knee surgery a few years ago and so far this product has been helpful in easing her discomfort.

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: Tabitha from Princeton. on 5/30/2020

None

Love this little darling. User friendly does exactly what it’s supposed to

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Deborah Martz from Sharpsburg . on 5/25/2020

Great

Had problems at first until I learned how to program the machine. It has helped Greatly with reducing my muscle spasms and the pain.

Did you find this helpful? 5 of 6 Found Helpful

Reviewed by: Dee from Pittsburgh. on 5/14/2020

Great compact unit still on a learning curve but so far it's easing the pain in my side and lower back

Did you find this helpful? 5 of 5 Found Helpful

Reviewed by: James Scott from Jupiter. on 4/10/2020

InTENSity Twin Stim III

very excellent unit, I was using a very old tens unit and it would shock you if a pad would lossen, this one shuts off if that happens, the best thing abut this one it does a thumping motion that goes up to where you set it then down and up repeatedly to the amount of time you set, I've been doing a lot strenuous work lately and I use it on my back when I get in the house, wake up in the morning no back pain. I highly recommend this unit.

Did you find this helpful? 9 of 10 Found Helpful

Reviewed by: David from Perry. on 4/7/2020

Great product

Does exactly what I wanted it to do, I saw no problems or downsides so far

Did you find this helpful? 7 of 7 Found Helpful

Reviewed by: (Verified Buyer) Yaroslav Lashkul from Ukraine. on 3/30/2020

Adult

Very easy to use dual combination unit. Would recommend to anyone.

Did you find this helpful? 7 of 7 Found Helpful

Reviewed by: Cyndy Welke from CA. on 3/1/2020

Patient

I bought this unit for the estim portion to use on my arm and leg to assist with the the recovery from San stroke. While it does what it says as far as moving the affected limbs only time will tell if it is effective

Did you find this helpful? 7 of 8 Found Helpful

Reviewed by: Frederick Kotthaus from Bainbridge, Ga. on 2/13/2020

Great unit

Great unit with good intensity. Nice to find both tens and ems in a compact unit. Nice job, keep up the good work

Did you find this helpful? 9 of 9 Found Helpful

Reviewed by: Ralph from Connecticut. on 2/7/2020

I recently purchased TENS & EMS Combo Unit and the electrode pads. and my wife and I love it. We both have multiple arthritises, including Ankalosing Spondylitis, fibromyalgia, lumbar fusion of 3 discs for her and 3 slipped discs for me, so this helps alot! It also was delivered quickly. The electrodes are of good quality and have lasted a long time, where in the past I used to just order from Amazon and those were so poorly made and had to be thrown out after just a couple of uses. I will definitely buy again from here and only here. Thank you!!

Did you find this helpful? 14 of 14 Found Helpful

Reviewed by: Marica Delgado from Spokane Valley. on 2/4/2020

I have used my TENS unit several times and find it to be easy to use and very effective.

Did you find this helpful? 7 of 7 Found Helpful

Reviewed by: Avis Thomas from Beverly, MA. on 1/16/2020

mrs

very essay to use

Did you find this helpful? 3 of 4 Found Helpful

Reviewed by: Kimberly from Fort Worth. on 1/15/2020

husband

I purchased this for my wife for Christmas.She uses it practically every day.She uses it at night when she reads before going to sleep.She also carries it with her to work and uses it while at the office.Really nice unit and very easy to travel with you.

Did you find this helpful? 9 of 9 Found Helpful

Reviewed by: Ron from Winston-Salem. on 1/9/2020

Great NMES Unit

Had a different brand from different supplier and it was not intense enough. The InTENSity III has been great for me anterior tibialis muscele regeneration after an anterior tibial nerve injury. All the NMES settings are perfect for my recovery and healing, especial the intensity. And much less expensive than what the PT facility wanted to charge me. This unity has helped my nerve and muscle recovery greatly. The only cons are that the instruction manual is lacking in clarity and that I can not turn the ramp feature off completely to do a one second on, one second off to time it to my walking. I would buy this unit again and I would recommend to a friend.

Did you find this helpful? 11 of 11 Found Helpful

Reviewed by: gazman01 from Gainesville. on 1/5/2020

Love this product

Love this product. It helps me

Did you find this helpful? 2 of 3 Found Helpful

Reviewed by: Jillian from Bayonne. on 1/1/2020

Very good product

I ordered this unit after finding out that I was going to pay almost 3 times this amount from a medical supply provider. So glad I found the exact same unit here at Tens Pro and saved myself so much money. Thank you for providing such excellent customer service also with the replacement case at no extra charge. I will definitely recommend this to anyone who needs this type of device.

Did you find this helpful? 9 of 9 Found Helpful

Reviewed by: Mark Kirchner from Green Bay. on 12/24/2019

I'm very pleased with how this TENS unit works. Much better than my first did.

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: Joni from Monett. on 12/20/2019

TENS & EMS Combo Unit

Amazing device, works perfectly! Also, this unit operates off power or a battery, a feature hard to find. You can not find a better device for the price!

Did you find this helpful? 8 of 8 Found Helpful

Reviewed by: Reed Markee from Jensen Beach. on 12/17/2019

Great Product

The product itself is great quality. The interface is user friendly. The unit is great for acute pain as it will relieve symptoms immediately while using it. I would recommend this product.

Did you find this helpful? 4 of 4 Found Helpful

Reviewed by: Brian from Belleville. on 12/13/2019

Chronic Pain Relief

The InTENSity Twin Stim III is three time better than the last TENS/EMS unit I purchased off of Amazon. The Amazon was listed as the best OTC unit in multiple reviews. InTENSity has the power and ranges that truely due provide for periods of relief. I took the unit to my physical therapist and he was impressed. He also took down the company contact info.

Did you find this helpful? 10 of 10 Found Helpful

Reviewed by: Greg from Missouri. on 12/2/2019

Great product

Everything I wanted and more at an amazing price. Thank you ??

Did you find this helpful? 5 of 5 Found Helpful

Reviewed by: Trent from Huntingdon. on 11/8/2019

Awesome product

Great powerful and helping me a lot love this 100%

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Lorenzo from Texas. on 10/2/2019

Needs a better manual

Product is ok, directions for use are very poor and difficult to understand. Does not address starting a session properly, and it took me a long time to figure out how to turn it on.

Did you find this helpful? 3 of 5 Found Helpful

Reviewed by: Kathy from St Marys City. on 9/10/2019

Parent

We purchased this unit back in April for our adult daughter at the request of her OT to help with rehabilitating her left arm and hand. It has been a great tool for her! Now our son has need for the same reason and we purchased another for him. Glad this has been of benefit to our kids!

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: Stephanie from Pine. on 7/17/2019

A second unit.

My wife and i are on disability and I have had a tens unit for 6 years. Now i got my wife one for her birthday. Too many times she needed it while i was using it. She loves it. Easy to use, and the case makes it nice for putting away.

Did you find this helpful? 6 of 7 Found Helpful

Reviewed by: Alden Gibbons from Louisville, Ky. on 7/17/2019

Great Unit

This is the exact unit used by the rehab hospital I was in. My O.T. from there have me some settings and it works great, what a quality unit!

Did you find this helpful? 6 of 6 Found Helpful

Reviewed by: Dale from Solvang. on 6/10/2019

inTenSity Combo Unit

love this tool. easy to use and effective

Did you find this helpful? 2 of 3 Found Helpful

Reviewed by: carmen from Florida. on 5/20/2019

mr.

works great portable easy adjustable