InTENSity Twin Stim III Digital TENS & EMS Electrotherapy Device

SKU: DI3717
InTENSity Twin Stim III Digital TENS & EMS Electrotherapy Device
InTENSity Twin Stim III Digital TENS & EMS Electrotherapy Device
InTENSity Twin Stim III Digital TENS & EMS Electrotherapy Device
InTENSity Twin Stim III Digital TENS & EMS Electrotherapy Device

InTENSity Twin Stim III Digital TENS & EMS Electrotherapy Device

SKU: DI3717
Regular price $79.95 Sale price $49.95 Save 38%
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  • 30-Day Return Policy
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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.

Thank you for reaching out to LSI International! We're here to assist you with any questions, concerns, or feedback you may have. You can contact us directly using the information provided below, or simply fill out our contact form for a prompt response.


Direct Contact Information:

  • Phone: 800-832-0053
  • Email: sales@lsiinternational.com
  • Address: LSI International, 1131 N Warson Rd Bldg D St. Louis, MO 63132, United States

Your feedback and inquiries are important to us. We strive to respond to all messages as swiftly as possible. Thank you for choosing LSI International, and we look forward to assisting you!

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at lsiinternationalcorp@gmail.com. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at lsiinternationalcorp@gmail.com. Damages and issues Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right. Exceptions / non-returnable items Your satisfaction with LSI International, and the products you purchase, is of the highest importance to us. We will gladly accept the return, or exchange, of most products up to 30 days from the date of purchase. The return of any allowed products that have been opened, used, or have broken seals are subject to a 20% restocking fee. Original shipping and handling charges incurred are always non-refundable and will be deducted from any refund for the cost of returned items, including in the event of a Free Shipping promotional incentive being applied to an order. Once a return is made, this promotional incentive is negated and the cost incurred must be accounted for. The restocking fee will only be waived in the case of all returned items being unopened, unused, and in their original packaging. Missing Instruction Manuals, Quick Reference Guides, and any other original literature from a returned product will result in an automatic $5.00 fee deducted from any refunds issued for the costs of those items. If you are unsatisfied with a product, or find any defects due to manufacturing and/or workmanship, please contact us. Fulfillment mistakes that we make, resulting in the shipment of incorrect products to you, will also be accepted for return up to 30 days from the date of purchase. To make a return, or exchange, please contact Customer Service to get a Return Authorization number. We will be happy to provide the number and explain the procedure to you. Our process is simple - Clearly write the return authorization number on the outside of the product packaging so we can easily identify the order, ship to our warehouse, and we will credit the account used to make the purchase within 7 business days from the date we receive the returned items, or contact you to complete an exchange. Returns or exchanges cannot be accepted without a return authorization number. If your item was damaged during shipment, please contact us for assistance. Our customer service line is available M-F from 9am-5pm CST at (800)-832-0053, or feel free to lsiinternationalcorp@gmail.com. If you experience any issues, or technical difficulties, with a product you ordered, please contact Customer Service. This would be tied to a manufacturer warranty process and we will be more than happy to set up a technical support call for you. Ultrasound Returns: Portable Ultrasound may only be returned if the product has NOT been used. Used Ultrasound devices may not be returned due to sanitary health reasons set by the FDA. If you are attempting to return the device due to defect or malfunction with performance, this would go through the warranty and we ask you to please contact us for a warranty claim. Pillows and Cushions: Any pillows or cushions may only be returned if they are unused and in the same condition customer received the item with original packaging. We only sell our pillows and cushions brand new for sanitary reasons. Exchanges The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. Refunds We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

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Customer Reviews

Based on 1 review
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Casey Blumenthal
Works like a charm!

I purchased this unit to stimulate my quad muscle after an ACL reconstruction. It is easy to use and delivers plenty of power to help with my recovery. I’m very happy to have it!

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