Customers Speak!

  • We received our ultrasound and have been using it nearly every day since. We purchased it to see if we could relieve pains and help us to get moving. We are pleased with the results. When we don't have pain with every step, it is easier to get out and get the exercise that will help with overall health. Thank you! - Gene R.

  • Easy to Order and arrived very quick. - Patricia M.

  • I’ve done business with company twice; first to buy the TENS unit then to buy a replacement cable. The price is great as is the product. It does what they claim and a bit more. I bought it to work my muscles but when my back became injured, I also used it for pain suppression. I was in no hurry to get the product but when it arrived in two days, it was nice. I recommend this company. - Mark H.

  • Seller was great; I will be using them again!!! - Ed H.

  • This is a great product. It helps with the pain. Price was excellent. Did research on it, can’t beat the price. My physical therapist thought it was great and took down the website to be able to recommend to other patients. - Charlotte L.

  • I would definitely use this merchant again. - Melody W.

  • The basic TENS unit I ordered from Medical Products Online is, I think, exactly like the one a physiotherapist used for the back and neck pain I had after a car accident. It really eliminated all the pain! I am now using my own unit for pain in my feet and legs from all the walking I have to do (no transportation options). Within a week of use at less than half the power output, I am glad to say it's working like a magic charm! - Mary L.

  • Medical Products Online is a great website with plenty of options to choose from. Adequate info is provided for all of their medical devices along with reviews from current users. Delivery was efficient. Prices are remarkable. I have already recommended this website to friends and co-workers. - Sharon G.

  • The customer service agents are very helpful, and knowledgeable about the units. I strongly recommend them to all my friends. - Marvelas E.

  • Shipping was fast and I'm also able to contact them about using the ultrasound I purchased. - Gloria B.

  • Total shopping experience great and outstanding customer service. Product delivered as promised. Will be doing future business and recommend them highly for quality products and exceptional customer service. - Raymond S.

  • They are perfect, exactly what I needed. - Lori S.

  • I purchased the MPO 5000 to replace a rental unit from another company. The MPO 5000 was much better quality. It came in a well protected storage case instead of a soft pouch that the overpriced rental unit came it. The rental unit cost was over 4 times more for each month than the MPO 5000 I purchased. I GRADE THIS UNIT EXCELLENT IN EVERY WAY. - K.C.H.

  • Everything is fine in every aspect of the transaction. I needed information about the use of the product and I received it and I received excellent service after sale. - Paul P.

  • Thank you so much for your promptness!! - Tina B.

  • Excellent service. Fast shipment. Product was what I was hunting for at a great price. - Charles M.

  • Excellent price for what turned out to be quality products. The order arrived in 2 days. They exceeded my expectations and I'll order from them again. - Stephen D.

  • Absolutely perfect transaction! I'm amazed at their service and speed of delivery. And best of all, the prices were among the best. A big shout out to Dolores (I hope I got her name right) she really took great care of me. I will be back! P.S. When I read back through this post, I sound like an employee but can assure all that this is an unbiased representation of a very satisfied customer who has shopped with them twice. - Jay P.

  • Easy ordering, fast shipping and delivery. I will order from this merchant again. - Christopher M.

  • I didn't have any surprises. This merchant did exactly what they promised to do and you can't ask for more than that. I will use them again. - Chris B.

  • It came much sooner than I expected!! I'm a happy camper!! Love the unit!! - Donald W.

  • Delivery, customer service, ease of ordering, products and equipment were everything I hoped for and more. Excellent turnaround time, and equipment was perfect. I would highly recommend this company to everyone. - Cathy L.

  • The item which I ordered has worked for me tremendously. It helps with my back pain and I have recommended it to others. - Celestine V.

  • The item which I ordered has worked for me tremendously. It helps with my back pain and I have recommended it to others. - Celestine V.

  • Just what I needed! - Al T.

  • This is a great value for a quality product. I have used this unit daily since I received it and it has performed flawlessly. Ease of set up was apparent and by reading the instructions, this unit can be ready for use in minutes. - Gary C.

  • Fastest shipping I have ever seen! T.E.N.S. unit is Very High Quality. I have paid for many hours at my doctor’s office, now I have many hours pain free. Thanks MPO! - Tammy T.

  • Very pleased with my shopping experience with Medical Products Online. I will recommend this website to all my friends needing this type of product. - John D.

  • I was very satisfied that the stim pads are above the rest that I have used in the past. Talk about being sticky wow they are the best ever! Time for delivery was great and on time as I ordered them for standard shipping. I would order from Medical Products Online again. - Robert C.

  • They use a TENS unit at physical therapy, so the only relief from the pain in my neck, trapezoids was 4 hours a week at PT when they would turn on the TENS!! My Physical therapist told me I could go online and buy one for home use. I immediately got on line and searched TENS units. There were quite a few to choose from. I settled on a unit and before I knew it it was at my door. It did not take me long before I found my favorite setting, when my pain level is a 9 I turn it up a hair, when my TENS unit brings the pain level down to a 4 I can turn it down. I wear it all day, every day! My TENS works better on my pain than any prescription pain killer. I'm wearing it now. One more thing, the company, they are so ready to help. At a point I thought there was something wrong with my TENS, they were ready to send me a new one, immediately, no questions....then I realized I just needed a new battery. I love my TENS and I love the company! - Michelle B.

  • A+ excellent service. - Armando D.

  • Product was exactly as specified, price was good, and shipping and delivery were ahead of schedule. Very good merchant. - Brian L.

  • I bought this product for my wife and it is great. It performs as advertised. It is light weight and produces a wide range of stimulation to the affected area to provide almost instant relief for tense back muscle spasms. I ordered it on a Sunday and as promised, it was delivered two days later and shipping was free. - Robert J.

  • Very fast service and the product is exactly what I ordered. - Rose M.

  • My physical therapist reviewed the specifications for this TENS unit. The transaction was easy and it was delivered quickly after purchase. The TENS unit works as it should. I'm happy with my purchase. - Terry V.
  • I have never purchased online before; my products arrived with excellent quality in a matter of days. Medical products that were always a challenge to find were delivered to my door! - Lynn S.

  • I'm in the medical field and this was money well spent. I had a strained muscle in my left should. After using the unit 2 times a day, I already can feel the difference. I would recommend this product for everyone. - Terry S.

  • I didn't have to use Customer Service but I feel it would have also been excellent. Site is very easy to use and find what you need, couldn't believe how quickly the merchandise arrived and I used the least expensive mode to save money! The prices were very reasonable for the things that I ordered also. I'll definitely shop again in the future. - Joyce C.

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MPO-8500 Four Channel Digital TENS and EMS Twin Stim Plus 2nd Edition

List Price:$299.95
Your Price:$119.99
You Save: 60%
Usually ships the same business day
2x2 Standard Pad $1.99 SPECIAL - E1P2020WC2:
Extra 2x2 Premium Pads - EF2020TC2-MPO:
Extra Standard Lead Wires - WW3005:
TENS Electrode Prep Spray $11.99 LS8812-2:

Brief Overview

Compact and portable, the MPO-8500 second-edition four-channel digital TENS and EMS Twin Stim Plus is a remarkably versatile machine that gives professional results and is FDA approved for home use. Featuring four channels, this Twin Stim Second Edition TENS and EMS combo unit is a portable treatment system that can give multiple simultaneous treatments. It's perfect for working on large areas of the body, such as the entire back, or in multiple places, such as both knees at the same time. Best of all, it's available from Medical Products Online at a steeply discounted price with free shipping available within the continental U.S.

Weighing just 1 pound, this portable unit lets you use eight electrodes at the same time and gives you the option of operating it by plugging it into a wall's AC power outlet or by using four AA batteries. It provides a large, easy-to-read LCD screen display and two treatment timers for easy use. A patient compliance meter lets you store operating records.

Eight treatment modes are available, including five TENS modes and three EMS modes. Each channel has separate intensity controls and is fully adjustable, making this machine customizable to provide treatments exactly how you want them.

Features include:

  • Eight self-stick hypoallergenic disposable electrodes

  • Four lead wires

  • Four AA batteries and AC adapter

  • Hard carrying case

  • Belt clip

  • Instruction Manual -Click here to download

  • Three-year warranty


The MPO-8500 Four Channel Digital TENS and EMS Twin Stim Plus 2nd Edition System is a world class four channel TENS and EMS system that is FDA Approved for home use. With four channels, this Profession and complete TENS Unit and EMS System is a portable treatment system that can provide multiple treatments at the same time.


This system is ideally suited to treat large treatment areas, such as the entire back, as well as multiple treatment areas at the same time, such as both knees. This unique capability is enabled by the ability to utilize eight electrodes from the same portable TENS Unit and Muscle Stimulator System making this unit a welcome addition for patients looking for cutting edge professional advanced treatment systems. The large LCD screen display and two treatment timers provide great patient functionality, and the patient compliance meter allows storage of operation records. The MPO 8500 includes 8 treatment modes, including Five TENS modes and Three EMS modes, couples with separate intensity controls for each channel and fully adjustable parameters, patients can easily customize their treatment. Additionally, the MPO 8500 provides patients the ability to use this unit on either four AA batteries or the included AC adapter.


Five TENS Modes

• B(Burst)

• N(Normal)

• M(Modulation)

• SD1(Strength Duration 1)

• SD2 (Strength Duration 2)

Three EMS Modes

• Synchronous

• Constant

• Alternate


• 4-AA Batteries and AC Adapter

Technical Details

Technical Description:

Channel: Four, isolated between channels

Output Intensity: 0~40Vpp (at 500 ohm load)

Waveform: Bi-Phasic Square Pulse

Power Source: DC 6V, 4xAA 1.5V battery or AC adaptor output: DC 9V, 800mA

Size: 5.4” x 3.1” x 1.1”

Weight: 1 lb. with battery

Pulse Rate: 2Hz~150Hz

Pulse Width: 50 to 300 Microseconds

On Time: Adjustable, 2~90 seconds, 1 sec./step

Off Time: Adjustable, 0~90 seconds, 1 sec./step

Ramp Time: Adjustable, 1~8 seconds, 1 sec./step, The “On” time will increase and decrease the setting value

Treatment Time: Two adjustable timers, from 1 to 60 minutes or continuous. Adjustable in 1 minute each step from 1 to 15 minutes, and 5 minutes each step from 15 to 60 minutes. Treatment time counts down automatically.

Patient Compliance Meter: This unit can store 60 sets of operation records. Total recorded time is 999 hours.