Save for Later
Want to know when you'll get it? Go

What is “Estimated Delivery Date?”

This is an approximate delivery date and is not a guarantee. Delivery estimates are available only for select items to be delivered in the contiguous United States, excluding APO/FPO addresses and PO boxes. Your final shipping cost will be available at checkout.

OverstockTM Store Credit Card

6 or 12 Month Special
Financing Available
No Payments & No Interest on orders over
$150 if you pay in full within 6 months.
Learn More ›
No Payments & No Interest on orders over
$150 if you pay in full within 6 months.
Learn More ›

InTENSity Twin Stim III TENS and EMS Combo

Overall Rating Rating 4.6  |  153 reviews  |  Write a review
Today $44.99
Save $2.94 (6%)
Item #: 13701240
    Purchase this user-friendly Intensity Twin Stim TENS and EMS Combo created by Current Solutions. The Twin Stim is a high-performance electronic muscle stimulator. Be sure to consult your physician before you consider using this product....more

Frequently Bought Together

Buy Together and Save 7% *

* Cannot be combined with other promotions.

People Who Viewed This Viewed

Sponsored Links What's This?
    The Twin Stim III is designed to help relieve pain without the use of drugs, making it an ideal choice for athletes and other active individuals. The device comes with an AC power adapter for easy charging, and it also runs on a 9V battery.

    • Brand: Current Solutions
    • Name: Twin Stim III
    • Transcutaneous Electrical Nerve Stimulation (TENS unit) and Electronic Muscle Stimulator (EMS) is a non-invasive, drug-free method of controlling pain
    • Includes AC-power Adapter
    • Wave Form:
    • Tens - Monophasic Square
    • EMS - Biphasic/monophase square wave pulse
    • Pulse Rate:
    • Tens - 1-150 Hz
    • EMS - 1-150 Hz
    • Pulse Width:
    • Tens - 50-300us
    • EMS - 50-300us
    • Output Voltage:
    • Tens - Constant Current
    • EMS - Constant Current
    • Current:
    • Tens - 0-105mA
    • EMS - 0-105mA
    • Modes:
    • Tens - 4
    • EMS - 3
    • Timer:
    • Tens - 1-60 Constant
    • EMS - 1-60 Constant
    • Instructions: Manual included
    • Takes 9V battery
    • Model: DI3717
    • Dimensions: 2 inches high x 10 inches wide x 9 inches long
    • Includes: Stimulator, Lead Wires, 4 Self-Stick High Quality Premium Electrodes, 9V Battery, AC Adapter, Hard Plastic Carrying Case, Instruction Booklet

    The content on this site is not intended to substitute for the advice of a qualified physician, pharmacist, or other licensed health-care professional. The products may have additional information and instructions on or inside the packaging that you should carefully read and follow. Contact your health-care provider immediately if you suspect that you have a medical problem. This product may not have been evaluated by the Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease or health condition.
See description
1 year Manufacturer
Plastic, Electronics
Model No:
Brand: InTENSity
Was this product information helpful?
Thank you for your feedback.
Thank you. Your feedback will help us create the best experience for our customers.

Showing 5 most helpful reviews on this product.

  • 5 Stars 109
  • 4 Stars 33
  • 3 Stars 5
  • 2 Stars 3
  • 1 Stars 3
  • Great Multi-Purpose Investment

    After dealing with some aches, pains, and pulls from triathlon training I stumbled across a TENS/EMS system that did a great job of eliminating these issues without getting "doped" up on meds or spending a fortune with my doctors. The TENS/EMS I was originally looking at was about $$$$, so I started looking into good names/brands, reviews, and more affordable options. This system met all the requirements and I got the system today. I've been like a kid with a toy on Christmas day - I have used it on my calves, lower back, upper back, deltoids, biceps, hip flexors, and abs. I'm loving it. It's relaxing, loosening up my muscles, and fairly easy to use. I HIGHLY recommend watching some video tutorials on YouTube and reading the instruction manual, otherwise you'll be one of the review up here giving it 1 star and talking about how it drives you crazy. It does require some know-how, but I got up-and-running in under 20 minutes.

    • How did the image on site compare with the actual product? Great
    • How accurate was the on site description of the product? Great
    • Please tell us about the quality of the product. Great
  • Helps my tennis\iPad elbow

    Yes, there is a new medical phenomenon called iPad elbow. At first I thought I hurt my arms lifting some bedroom furniture, but that was months ago. The arm braces helped a little, but did not cure anything. I saw this set and purcahsed because of the good reviews. Everyone was right. Take the time to read the manual so that you understand the difference between TENS and EMS. Whatever mode you are in, once all your settings are up, you push the up arrow to increase the intensity to a point that is comfortabnle to you. That is how you "START" the device. For the life of me I was wondering why it was all programmed but wouldn't start pulsating. This device pays for itself after missing 3 PT deductables. If you plan on using this a lot, you may end up needing to buy some extra sensor pads.

  • This Works - Get your pain relief here

    I purposefully held off on writing a review until the newness factor wore off. This works as advertised and has a couple of neat features. I go for physical therapy somewhat regularly due to my condition in my shoulders and neck. This product does everything the therapists product does, plus a bit more. (She even help me tweak some of the settings). Extra bonus, this has the A/C adaptor so you are not going through batteries like crazy. This is perfect for home use. 4 pads means that you don't feel lacking (i had previously tried a 2 pad). The pads have lasted for between 6 - 10 uses of a half hour in duration. The directions are easy to follow and use for the settings. Nice that it comes in a kit and everything can be kept together. Bottom line - the product really works well. I have had no issues and at this point have had it for almost 2 months.

    • How did the image on site compare with the actual product? The Image on the Site matched the product exactly
    • How accurate was the on site description of the product? Accurate
    • Please tell us about the quality of the product. Seems like a high quality product
  • Excellent deal and fantastic product.

    I found this to be of high quality and easy to use. The instructions are very easy to understand and using the unit is very simple. I picked this Intensity Stim lll over another websites product costing more but doing basically the same as this unit does. I find it to be a great value for the money. Plus the pads are of high quality and last a long time. Does a fantastic job of helping to relieve muscle pain in my arm and shoulder area. Very lightweight so if you want to clip it to your belt or put in a coat pocket, etc. the unit is easy to take along with you wherever you go. Its even small enough to fit in your shirt pocket. The a/c adapater is a great plus for using it at home and saving battery life. If you are thinking of getting one of these for your pain management then I highly recommend this unit. High quality unit, very well made. I give this 5 stars.

    • How did the image on site compare with the actual product? Very good picture and realistic.
    • How accurate was the on site description of the product? Very accurate description.
    • Please tell us about the quality of the product. High quality.
  • Great product

    I actually got this product for a relative with lower pain pains and he hasn't tried it yet so I don't know if it will help his back pain. I tried it on myself just to make sure it works before shipping it overseas and this little machine does an amazing job relaxing your muscles. I tried on the different settings and different intensity and was very pleased with the product. The product arrived within two days, I was very surprised since I got the regular overstock free shipping.

    • How did the image on site compare with the actual product? yes
    • How accurate was the on site description of the product? very
    • Please tell us about the quality of the product. excellent
View All Most Helpful Reviews
  • Works

    Gets the job done, recommended.


    bosi7 Mar 24, 2015

  • Pain Relief

    Use of this machine is for muscle spasms and pain. I have considerable back issues and rather than take more meds, I use this to relieve and reduce my back discomfort.


    Eileen M G. Mar 17, 2015

  • Great for pain

    I've only had this for around three weeks, but it's really helpful for the pains I've been having. I use the TENS on my hands for tendinopathy and I use the EMS on my shoulders for muscle pain. I only wish I'd gotten extra electrodes because my dog grabbed the ones that came with the unit. ;) When I found them the next day they were all dried out and I haven't been able to "reconstitute" them. I had some old 1" ones I'm using, but can't wait for my 4x6" ones to come in! There was a little bit of a learning curve for me as I didn't remember about the EMS ramping up and down. I had to contact the company for help. Once you get familiar with it, you can't beat it for pain. So long drugs!

  • Mike

    Works great and very easy to operate with. They use this for 2weeks and my lower back pain is almost gone


    Paola P. Feb 19, 2015

  • Good product

    Quick shipment, easy to use and very happy with my purchase!


    Angel J. Feb 16, 2015

View All Most Recent Reviews

Product Q&A

Ask a Question

Why did you choose this product? Overstock on Mar 21, 2015
Subscribe to Answers
Answer This Question

Referral from friend  on Mar 21, 2015
My wife needs it for surgery she had on her leg.  on Mar 21, 2015
doctor recommended  on Mar 26, 2015

Does this thing sap you I am not sure what it does Crystal on Feb 7, 2015
Subscribe to Answers
Answer This Question

Hello Crystal, the TENS unit does not sap you, but sends comfortable impulses through the skin to stimulate the nerve (or nerves). This stimulation is designed to treat pain. We hope this helps. Thank you for shopping with us. overstockcustomercare1 on Feb 12, 2015

Do you currently have replacement electrodes compatible with this unit? Sp01 on Jan 14, 2015
Subscribe to Answers
Answer This Question

Hello Sp01, please see item# 14146607 for replacement parts. Thanks for shopping with us! overstockcustomercare1 on Jan 17, 2015

Can you supply adapter for NZ? dozen on Aug 17, 2014
Subscribe to Answers
Answer This Question

Hello dozen, we do sell universal adapters. Please review, Item #: 15873872. It should work with New Zealand's 3 prong / Earth pin. I hope this helps. Thank you for shopping with us. Rochelle B overstockcustomercare2 on Aug 20, 2014

Does this product ship to Australia? dazza1 on Aug 4, 2014
Subscribe to Answers
Answer This Question

Hello dazza1, some items may not be eligible for international shipping due to size and customs restrictions. Consequently, there may be items for sale on our U.S. site that are not available on our international site. If the item can be shipped, your shipping rates and fees will be presented to you at checkout. Please feel free to contact us again with any further questions. Thank you for shopping with us! overstockcustomercare1 on Aug 18, 2014

What kind of lotion or cream do you use on your skin before attaching the electrodes? dawnmister48 on Jul 20, 2014
Subscribe to Answers
Answer This Question

Thank you for your inquiry, dawnmister48. Specialty TENS lotion can help lock in moisture, but we do not currently sell this item. Please let us know if you have any other questions. Thank you for shopping with us. overstockcustomercare1 on Jul 26, 2014

Can you get larger pads for this model? rocketstar62 on Jul 1, 2014
Subscribe to Answers
Answer This Question

Hello rocketstar62, unfortunately we do not offer larger pads, but we do have TENS Premium 2-inch Square Electrodes under Item #: 14146607. Thank you for shopping with us! overstockcustomercare1 on Jul 2, 2014

How long are the wires from the pads to the control device? kkoharski12 on Apr 5, 2014
Subscribe to Answers
Answer This Question

Hello kkoharski12, thank you for your inquiry! The standard lead wires are 45 inches long. I hope this helps. Happy shopping! overstockcustomercare1 on Apr 14, 2014
45 inches j444ci2685sc on May 22, 2014

Does the twin stim III offer the same programs as the twin stim 2nd edition unit? nylizardlady on Mar 13, 2014
Subscribe to Answers
Answer This Question

I apologize but did not find the 2nd edition unit to compare with this model. Have a very nice day nylizardlady. overstockcustomercare1 on Mar 27, 2014

What is the point in advertising this in AUD when at checkout it says does not ship to Australia? pathath on Feb 8, 2014
Subscribe to Answers
Answer This Question

practitioner supplies in adelaide sell them allang2376 on Feb 12, 2014
Hi pathath, our site is designed to show you all of our products. Unfortunately, some of the items are unable to ship to other countries. We apologize for any confusion that this may have caused. Thanks for shopping with us. overstockcustomercare1 on Feb 19, 2014

Like to know the size in inches of the cable entry to buy an extra cable 1234sara on Jan 3, 2014
Subscribe to Answers
Answer This Question

Hello 1234sara, Thank you for your inquiry. Unfortunately we are unable to acquire an answer at the moment. We apologize for the inconvenience and will continue to try and answer this for you. You will receive an email notification once an answer is posted. Your patience is appreciated. overstockcustomercare1 on Jan 14, 2014

would like to purchase extra electrodes, which would be displayed, the size of the socket in inches? 1234sara on Dec 27, 2013
Subscribe to Answers
Answer This Question

Hello, 1234sara. This comes with electrode pads that are 1.5 inches square. I hope this was helpful to you. Please let us know if we can help you with anything else. Thank you for shopping with us. overstockcustomercare1 on Dec 30, 2013

Why is this TENS unit monophasic? nantizle on Dec 3, 2013
Subscribe to Answers
Answer This Question

Hello nantizle, This is the only information the manufacture has given us. Here is the manual Have a great day! overstockcustomercare1 on Dec 4, 2013

how can i purchase this? is the price the same that i have to pay as shown. rodel1974 on Nov 23, 2013
Subscribe to Answers
Answer This Question

If you would like to purchase this you would select the quantity you would like to buy, and then click on the add to cart button. The total would then show at time of check out. overstockcustomercare2 on Nov 25, 2013

Warranty info? lupe88 on Oct 14, 2013
Subscribe to Answers
Answer This Question

Hello lupe88, This unit features a 1 year manufacture warranty. Thank you for shopping with us. overstockcustomercare1 on Oct 18, 2013

Is there a belt clip on this model? cheesehead5313 on Oct 5, 2013
Subscribe to Answers
Answer This Question

Hello cheesehead5313, we appreciate your inquiry. Yes, this item does have a belt clip. We hope you have found this information helpful. Thank you for shopping with us. Have great day! overstockcustomercare1 on Oct 8, 2013

Is this device good for muscle toning or slimming? rod5007 on Jul 19, 2013
Subscribe to Answers
Answer This Question

Thank you for shopping with us rod5007. It is recommended that you consult a medical professional before you purchase any equipment of this nature. The theory is that this will tense and then relax the muscle. I hope that helps. overstockcustomercare1 on Jul 24, 2013
No, use it for muscle and pain relief indianaj69 on Aug 8, 2013

What kind of batteries does this unit use??? cfoxtrot on Jul 4, 2013
Subscribe to Answers
Answer This Question

Thank you for contacting us cfoxtrot. This takes a 9V battery or AC adapter, the same as SKU 14050383. Please let us know if you have any further questions. overstockcustomercare1 on Jul 11, 2013
9 volt...get good ones, takes a load off the batteries indianaj69 on Aug 8, 2013

Is Ac adapter included with the purchase? What is the voltage the Ac adapter can accept 120-240v? overstock77777 on Jun 28, 2013
Subscribe to Answers
Answer This Question

Hello overstock77777. Thank you for your interest in the InTENSity Twin Stim III TENS and EMS Combo. Yes the AC adapter is included with this, 110 volts. I hope this helps, thanks for shopping with us. overstockcustomercare1 on Jul 2, 2013
120 volt std jerryb6299 on Feb 18, 2014

Is there a modulated mode in the TENS? rasheedaa on Jun 16, 2013
Subscribe to Answers
Answer This Question

Hi rasheedaa, we were able to verify this informartion with our support team. Yes, the TENS mode has two modulated programs. Program ‘M’ modulates the pulse width and the rate at which it modulates can be set by adjusting the cycle time setting. A shorter cycle time will make it modulate more quickly. Program ‘M1’ does the same thing except it modulates the pulse rate instead of the width of the pulse. Thanks for shopping with us. overstockcustomercare1 on Jun 18, 2013

Be the first to ask a question about this product.

Usually leaves our warehouse in 1-2 business days. *

Standard Return Policy:

Items must be returned in new or unused condition and contain all original materials included with the shipment. More details

FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.

Shipping Information:

Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
Standard shipping details
Expedited shipping details

* For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.

Buy Now with Bitcoin Learn More