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.

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.

Is this device FDA approved?

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

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

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

Part Number:

DI3717

Availability:

In Stock

On sale: $39.95

127 Review(s)

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

Questions about this item? Ask here.

(See 25 Questions)

Quantity

Quantity Discount Pricing

Quantity
Price
6 - 31
$36.95
32 - 63
$34.95
64+
$32.95

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

mr.

works great portable easy adjustable

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Reviewed by: rick simmons from Massillon. on 2/27/2019

Bring great relief to my back. Easy to use. AA+++

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Reviewed by: (Verified Buyer) LMS from Ohio. on 1/27/2019

I highly recommend this product.

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Reviewed by: Paul from MA. on 1/4/2019

N/A

Same unit as "leased" by my therapy center, so was used to using it. Liked it then, so opted to own my own for great saving at the very attractive sale price. It's a good addition to our home therapy equipment.

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Reviewed by: David from Athens, AL. on 12/26/2018

blue collar

Wonderful product! Glad I bought it and NO MORE batteries!

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Reviewed by: Barbara from Baltimore. on 10/19/2018

Mrs.

I purchased this for my daughter who is on a years bike tour and into the 9 th month. I haven't had a report back from her yet

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Reviewed by: Martha Tighe from Murrieta, Ca. on 10/12/2018

I actually already had a tens unit but was burning through the 9 volt batteries. This unit has a money saver (??) A C adapter & good price point ??

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Reviewed by: Larry Bonelli from Franklin. on 10/8/2018

Simply the best

This combo unit you cant beat the price it does what its intended for plus you get the power adapter so you can save on battery purchases...I love it

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Reviewed by: Pantherrilla from Atlanta . on 10/6/2018

Quality of Life

This little beauty has increased my quality of life. Not kidding. Degenerative discs in neck vertebrae and torn rotator cuff, no pain medications just this used in the evening before bed, when pain is the worst. Works better than drugs. Highly recommended.

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Reviewed by: Irene from Maine. on 9/16/2018

Recommended by my OT. Excellent little unit.

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Reviewed by: Alexandra Nawaz from Atlanta,Ga. on 9/5/2018

N/A

I love my TENS unit. Works great and gives me the relief needed.

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Reviewed by: Deborah from OH. on 8/28/2018

Miss

Works really great

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Reviewed by: Jean from Fortwayne. on 8/26/2018

Operations Supervisor

2 thumbs way up!!

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Reviewed by: Charles Smith from Scranton. on 8/19/2018

retired

Works well. Hopefully it will help.

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Reviewed by: linda brecher from Sedona. on 8/14/2018

Master and Commander

Excellent product, easy to use, great communication

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Reviewed by: Gary Barger from HERNANDO. on 7/29/2018

supervisor

THE BEST INVESTMENT - I hate taking risks with my money glad I did take one on this product :) thank you so much

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Reviewed by: Van C from jersey city. on 7/19/2018

Machine operator

Was amazed at the punch this little unit packs. Works very well and was a good investment. Comes in its specially designed case to keep it protected and nice and neat. A+

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Reviewed by: Anthony r from Centerville. on 5/29/2018

Cost-effective!

I bought this product after having been diagnosed with shoulder impingement. I use TENS for pain management, and EMS for strenghtening muscles around the shoulder. I have benefited appreciably. My physio confirmed that the parameters in a pretty acceptable range, and they do not have to be as sophisticated as their devices' have. I would recommend this product. I could add that the pads last more than 10 uses as long as they are applied over a precleaned skin.

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Reviewed by: Ugur from BOSTON. on 5/8/2018

It works for me!

In the several weeks that I've owned the "InTENSity Twin Stim III Digital TENS & EMS Combo Unit" I've found it to be a very useful and high quality device. However, a few weeks after I bought it, I also bought a "Twin Stim Plus 3rd Edition - 4 Channel Digital TENS, EMS, IF & Russian Unit" and if you don't mind spending the extra money, you also get "IF" which I've found to be quite a bit better than just TENS alone. I highly recommend both units. The IF offers more pain relief than just the TENS but it requires at least 2 channels (4 electrodes) in a cross configuration, so depending on the location of the pain, you can't always use it but in most cases you can still use the TENS. If you have pain and haven't tried a TENS and/or IF unit... what are you waiting for?

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Reviewed by: Ed from Tennessee. on 5/1/2018

This product is perfect for those who had chronic pain of shoulders and knees. I seldom take pain pills since I used this product. It is also good to stimulate sagging muscles of abdomen as a result of pregnancy.

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Reviewed by: Edna Foster from California. on 4/3/2018

Good overall, but the electrode pads could be better

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Reviewed by: Donna Metz from fayetteville. on 3/23/2018

Dad

GREAT Unit!!! Shipping was very fast. And the unit works GREAT....and with the AC adapter just makes it even better... Thanks for the good services

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Reviewed by: Ed Koonce from Everett. on 3/7/2018

The Twim Stem III is amazing, works great, and easy to use.

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Reviewed by: DH from California . on 12/30/2017

Item came as promised and works as described. very pleased with the tens intensity twin slim III.

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Reviewed by: Donald McMahon from Kirkwood. on 12/29/2017

Owner

Very nice unit and works great. Thank you

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Reviewed by: Jamie from Alabama. on 12/10/2017

Better unit than expected. Being able to adjust pulse and intensity are. To common features for a unit in this price range. Having an A/C adapter is also a bonus. Very happy with product!

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Reviewed by: D smith from Tennessee . on 11/11/2017

So far this adds some instant reief. I'm please with my purchase. The cords are easily tangled,kind of annoying but all in all worth the money Buy extra pads as though after a few uses the don't stick well

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Reviewed by: Ruth from Las vegas. on 11/2/2017

Mrs

I have chronic shoulder pain due to impingement and tendonitis, with occasional flare ups in pain. After using this product a few times my pain has been greatly reduced. The effectiveness of this TENS unit is comparable to what was used on me during physical therapy. I especially like that you can adjust the pair of electrodes independently with regard to intensity. I also chose this unit because you can both use AC power or batteries. This saves on batteries when I am using the unit at home while sitting on the couch.

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Reviewed by: Heike McConnell from Bartow FL. on 10/18/2017

Works great

Bought for my sis and only great reviews. Delivered in mint condition even during hurricane Irma season! I recommend this service!

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Reviewed by: Sherland Showers from Trinidad & Tobago. on 10/7/2017

Excellent Unit

This was a great purchase for me. Its very comparable to the TENS I get in physical therapy. My PT reviewed it for me and showed me how to operate it. She was impressed, said it was a great system!

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Reviewed by: Amanda from Powell. on 9/8/2017

Sales

Fantastic product and well worth the money. It takes away my shoulder tension.

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Reviewed by: Stan from Wisconsin. on 8/10/2017

Intensity TwinStim

This TENS unit has provided me with substantial relief from radiculopathy associated with spinal nerve compression. While it doesn't cure or completely relieve the discomfort, it does reduce it and make more tolerable. It is not a treatment, but another pain management tool for my toolkit. 4 stars, rather than 5 because it took me a bit to figure out how to use the settings; the instructions could have been simpler.

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Reviewed by: Laura from Beatrice. on 7/3/2017

Ms.

This has been a miracle for flareups from a back injury.

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Reviewed by: Nola Brocato from Houston. TX. on 6/3/2017

teacher

I have had this unit for 6 weeks. It has been excellent. I am sure my recover from a back injury has benefited greatly. It is extreme easy to position and use. I have had 8 weeks of physical therapy that also uses the TENS for treatment. This unit is equal to the quality of the pt product.

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Reviewed by: Susan from NY. on 5/8/2017

End User

Very satisfied with my tens unit. Wall adapter connection to unit seems a little fragile but works fine. Be sure to wash and dry your skin where you intend to place electrodes so they will stay on correctly. When you peel the electrodes off, pull near the wire with a slow steady pull. Once off wipe sticky side quickly with an alcohol wipe, let it dry then place back on the plastic sheet. This will extend the life of the pads.

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Reviewed by: Mark Hanna from Sierra Vista. on 5/7/2017

patient

excellent item replaced old unit with this and cant believe the difference.

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Reviewed by: rick from Evansville. on 5/7/2017

Administrative Asst.

This item works well once you figure out how to set it up. I've owned other TENS units that were very user friendly and intuitive. This particular item, even after reading the directions, was a bit harder to figure out. However, once you have it down...it works great.

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Reviewed by: Diana from Rochester. on 4/28/2017

Mrs

I have been using the TENS unit on a daily basis. It helps the pain because I do not have to use pain medication, so it is working. Also, the only thing that I do not like are the pads because some of the sticky glue seems to come off the pads every time it is used. Otherwise, I am very happy with this unit.

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Reviewed by: Evelyn C. from Florida. on 3/28/2017

Trainer

This item is not a toy. It is a professional tool that takes some time getting used to, to learn how to use it. It is very high quality and has all the features you will ever need, and more. Plan to spend several hours learning how to use it, but you will love it!

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Reviewed by: Rick from Santa Barbara. on 3/20/2017

Satisfied so far

Owned for one month. Use plugged in, no battery. Purchased to help with chronic rotator cuff problems due to weight lifting, and for occasional back spams. The unit seems to work fine, and as expected. Through stretching, and other therapeutic exercies, I have not doubt that this unit is contributing to a more rapid recovery. For the price of this unit, I have no qualms about buying it or another like it.

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Reviewed by: Tim from Missouri, USA. on 2/15/2017

shoulder - arm rehab

My O.T. recommended this unit to work on my shoulder, arm and hand after surgery. What can I say? The unit works excellent. A little confusing to set up but once my O.T. set it up for me I use it several times a day. I highly recommend. The price is a steal for the quality. I'm still using the first set of batteries - incredible ! Thanks

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Reviewed by: Rick from North Carolina. on 1/14/2017

Mrs

Great piece of equipment. We like it very much.

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Reviewed by: Carol Pruitt from Nevada. on 12/31/2016

Beneficial

After a little experimentation I found the proper location for my strained calf. Did an hour a day and before I knew pain was gone and I could run again. 3 weeks off didn't do much to help but this compact little unit sure did the job.

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Reviewed by: Gene C. from Illinois. on 12/28/2016

Pelvic Health Occupational Therapist

Excellent combo unit for patient at home use. Compatible with vaginal and anal probes used in pelvic therapy. Non cost prohibitive option that allows therapist a variety of parameters to customize treatment.

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Reviewed by: Christy Watson from Tupelo, MS. on 12/7/2016

JEFFROB

Great product. Great price.Works extremely well.

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Reviewed by: Jeff Robinson from Clinchco. on 12/3/2016

Mrs.

I previously had another brand (cost $2,500. which medicare paid). I purchased the above unit and found it does the same thing as EMS program. Works the same - just as well. The person I spoke to for help in setting it up was extremely helpful and very patient. I would highly recommend the product and your company.

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Reviewed by: Roberta Spurrier from Jacksonville Beach. on 11/13/2016

Patient

After 4 months of excruciating pain in my left arm and hand from postherpetic neuralgia and bad reactions to various pain relievers, I purchased this TENS/EMS unit. Relief begin with the first use and within a week of 2 to 3 uses per day, the pain was down to a minor annoyance. The only limitation seemed to be that I could not properly attach an electrode to the end of my little finger and slight pain remains in that finger.

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Reviewed by: Robert Tait from Pasadena, CA. on 11/7/2016

Legal Assistant

By using the Tens unit I can half the time it takes to recover from a back ache.

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Reviewed by: Corinne Wright from texas. on 10/29/2016

Mrs

I bought this because my husband had a stroke which left him with no muscle tone on his right side. The PT had asked if I had heard about the benefits of using the unit. I had so I ordered it & it has been great tool if used regularly.

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Reviewed by: Jan from Oregon. on 10/6/2016

MS ND

Love it, use it all the time, great battery life.

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Reviewed by: Murray Anson from AZ. on 7/20/2016