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

Your Price:$46.95

Retail Price:$54.95

Your Savings:$8.00(15%)

200 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
10 - 31
$44.95
32 - 63
$43.95
64 - 95
$42.95
96+
$42.50

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

Tenspro

This product works very well. It is helping me with strengthening and pain. My PT programmed it and it is very easy to use. I put it on in the morning and night and can feel it working.

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Reviewed by: Sandy from Clarkston. on 8/18/2024

For tVNS

This product is great for the price to engage in tVNS as it allows the user to bring the setting quite low which is necessary for tVNS! Saved me lots of money!

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: AT from CA. on 5/26/2024

After 4 epidural injections, my doctor recommended this device. It couldn’t have been a better recommendation. I use it often to relieve muscle strain as well as sciatic pain. Highly recommended

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Walt Hack from Mississippi . on 5/10/2024

Great for back pain

This unit has done wonders for my back pain. I recommend it to everyone I know.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: James LeGendre from OXFORD. on 4/21/2024

PTA

We use these as extra units in our outpatient clinic and I love them. I bought one for my mom to use at home because of how easy it is use. It also doesn’t feel like it’s “biting” like other portable units do. Another reason this is a great unit is how affordable it is for what you get, and you can’t beat that!

Did you find this helpful? 2 of 3 Found Helpful

Reviewed by: Madison from Georgia. on 1/1/2024

Great device

Quality product that does just what I need for EMS

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: Hannah from PORTLAND. on 11/12/2023

Works great

I call this my “shock therapy” and use it every day. Two of my therapists showed me what to do so that I use it correctly. The machine does what I need it to and I like how it can be set up. Strokes suck, but this machine helps rehabilitate.

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: Cody from Utah. on 9/15/2023

owner

Great service and quality products!

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Tim Sheeran from Grand Rapids. on 9/15/2023

Mr.

Good quality. These units are as effective for me as those that I've experienced in a professional treatments.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: SS from U.S.A.. on 7/21/2023

none

Stickers hurt the first time you pull off but it gets easier so no worries there . Item works as advertised . now just waiting for results .

Did you find this helpful?

Reviewed by: gali from california. on 7/10/2023

Tens unit

This is my 3rd one I have bought. I bought one for myself , and bought each of my daughters one, for their birthdays. After using mine, they loved the results. I bought them each some supplies to go with them, and they are set. Now I don’t have to lend mine out, and really need it when someone else is using it. I also gave another friend the order info for your online order site, and she wants to buy one too. My husband has been using mine too, as he also likes it. Need I say more about your product. As you can see, we think it’s really great.

Did you find this helpful? 2 of 3 Found Helpful

Reviewed by: Linda from Va. Beach, va.. on 6/4/2023

Ms.

Product works as advertised and has been helping with the improvements we needed. Also, most people might need a professional to explain where/how to properly place the electrodes. Only issue is that the electrodes lose their stickiness very quickly; easy fix is to clean after every use (just that it is inconvenient). Otherwise happy with the purchase.

Did you find this helpful? 3 of 3 Found Helpful

Reviewed by: Anita from Atlanta, GA. on 3/26/2023

Ms.

I am pleased with the TENS; it provides temporary relief from shoulder/back pain.

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: June Gordon from Sebastopol. on 12/11/2022

Ease of use

Its a very nice and easy to use. I still cant get it to open my fingers. Its hard to figure out where to put the pads. But i use it every day and i got my thumb to move

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: Angie baltzell from Mountain dale, ny. on 12/1/2022

Great purchase!

Quality device, works as promised.

Did you find this helpful? 2 of 2 Found Helpful

Reviewed by: Matt from Iowa. on 9/1/2022

Mr.

Excellent product with somewhat obscure documentation. Once you have worked with the unit, the documentation becomes easier to interpret, but it is not well organized, and is confusing for someone that is not technically inclined or experienced with electronics.

Did you find this helpful? 10 of 10 Found Helpful

Reviewed by: Paul Richardson from Kelseyville. on 7/4/2022

Great device

Very easy to use, well built affordable

Did you find this helpful? 5 of 7 Found Helpful

Reviewed by: Mike from Syracuse, ny. on 5/31/2022

Doctor of Chiropractic

I've been using TENSpro's products for a long time and was happy to see this particular inexpensive programmable unit. I have been using a relatively new therapy for stress relief in patients called Transcutaneous Vagus Nerve Stimulation (tVNS) which requires a specific range for pulse rate. This unit is exactly what I need for my patients--I've been recommending that they get it along with the metallic-rubber earclips that are required for tVNS. Glad that TENSpros are able to keep up the supply for my increasing demand from my patients! tVNS may help with PTSD, tinnitus, inflammation reduction, possibly even hypertension and digestive disorders--anything that gets dys-regulated when over-stress causes vagus nerve "disruption".

Did you find this helpful? 20 of 21 Found Helpful

Reviewed by: Dr Tom Robertson from Odenton, MD. on 3/23/2022

This unit is a bargain for all that it does. It has been very impactful on tight sore muscles

Did you find this helpful? 5 of 8 Found Helpful

Reviewed by: Janene from Colorado. on 3/2/2022

Mr.

I love this thing!!!!

Did you find this helpful? 4 of 7 Found Helpful

Reviewed by: Marx from Fl.. on 2/6/2022

Happy with the easy to use for this product. I have been in the market looking and my Physical Therapist suggested this product and it has been used often with my recent shoulder surgery to help with recovery. I definitely recommend it for anyone that is an athlete.

Did you find this helpful? 5 of 5 Found Helpful

Reviewed by: Teresa from Fair Oaks. on 1/21/2022

Helpful Home Unit

This product has helped with my arm rehabilitation by stimulating my deltoid, biceps and rotator cuff muscles. I highly recommend.

Did you find this helpful? 6 of 6 Found Helpful

Reviewed by: UP Mom from Skandia. on 11/19/2021

Excellent easy to use device. Does what its supposed to and for a fair price.

Did you find this helpful? 6 of 7 Found Helpful

Reviewed by: Mitch from Iowa. on 10/10/2021

Mrs

First, my husband loves the relief he is getting from the TENS unit. Second, I love the relief he is getting. It took us a while to figure out how to operate the unit...but now, we got it down. Great product. Great Service.

Did you find this helpful? 9 of 9 Found Helpful

Reviewed by: denise from richmond, va. on 9/14/2021

works as adveriised

Did you find this helpful? 1 of 3 Found Helpful

Reviewed by: joe from usa. on 9/2/2021

user

I purchased this unit because I have been having dull aching back and leg pain. I was surprised that after the first treatment, the pain seemed less intense. Not miraculously gone, but it was more tolerable to function with. I have been seeing a chiropractor who asked me to bring in the unit. After looking it over and downloading the manual for me, she printed out some recommended settings for me to use and told me I had purchased a very good unit. I have been following her recommendations and I can honestly say it has helped me function a lot better. I got a very good price for the unit and some of the associated equipment. It was a very good investment for me and I would not hesitate to recommend it to anyone who has some type of pain or discomfort. There are quite a few settings to choose from and the best thing to do is experiment with what feels best for your specific condition. No complaints about it from me

Did you find this helpful? 14 of 15 Found Helpful

Reviewed by: Joe from MADISON. on 8/8/2021

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? 4 of 4 Found 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? 5 of 5 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? 13 of 13 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? 10 of 10 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? 9 of 9 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? 15 of 15 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? 8 of 8 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? 3 of 3 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? 8 of 8 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? 22 of 22 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? 7 of 7 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? 6 of 6 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? 5 of 5 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? 13 of 13 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? 5 of 5 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? 7 of 7 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? 5 of 5 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? 4 of 4 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? 7 of 8 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