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⚡ Recharge your recovery — pain relief and muscle therapy, anytime, anywhere!
The iSTIM EV-804 is a professional-grade, rechargeable TENS/EMS combo device featuring 2 independent channels, 7 therapy modes, and 24 preset programs. It uses advanced Japanese SEKISUI gel electrodes for optimal conductivity and comfort, delivering drug-free pain relief and muscle stimulation. Certified safe and FSA/HSA eligible, it’s designed for effective management of chronic and acute pain, muscle relaxation, and strengthening—all in a sleek, portable unit.














| ASIN | B07D1YPTGF |
| Best Sellers Rank | #98,308 in Health & Household ( See Top 100 in Health & Household ) #213 in Muscle Stimulators & Accessories |
| Brand | iSTIM |
| Brand Name | iSTIM |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 1,087 Reviews |
| Form Factor | handheld |
| Item Dimensions L x W x H | 7"L x 6"W x 3"H |
| Item Weight | 150 g |
| Manufacturer | Everyway4all |
| Manufacturer Part Number | EV-804 |
| Massager Form | Massage Mat |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | iStim EV-804 |
| Model Number | EV-804 |
| Other Special Features of the Product | Rechargeable |
| Power Source | Battery Powered |
| Product Benefits | Muscle Therapy |
| Product Grade | Home |
| Specific Uses For Product | Arthritis |
| Style Name | Modern |
| Target Use Body Part | Whole Body |
| Unit Count | 1 Count |
| Use for | Whole Body |
| Water Resistance Level | Not Water Resistant |
K**L
Love it!!
Love, love, LOVE this little TENS/EMS unit! It's perfect for what ails both me and my hubby. One reason a star got knocked off is that the directions are confusing and it doesn't explain what the symbols mean in a way I was able to understand. Had to watch a few YouTube videos of a chiropractor explaining what width, pulse rate, etc. were. Once I got the gist of it, everything else was very, very simple. I do wish that the electrodes didn't use the pigtail leads and just snapped into place. Hard to push the metal part into the black part of the electrode due to wrist pain, but eventually was able to get the wire to go in. Attaching it to my shoulder where I'm experiencing the most pain was a little bit of gymnastics, but I was able to place the electrodes in the correct spots without assistance. Electrodes stick very well the first and second time, but then start to lose their adhesion ability the third time so had to switch them out for fresh ones. Thankfully the unit came with extra electrodes, and I also ordered a whole bunch extra, too because I know up be going through them quickly. Hubby and I were fighting over who would get to use the machine first on Sunday, lol, so I just went and ordered another one so we can do our treatments at the same time without having to wait on each other to be done. All in all, great little unit. Also showed it to my chiropractor and he says it's a great quality machine and he approved of it, so that's a plus. Very effective for pain and tension relief, love the different programs, and that you can customize the settings if you need something different. There are 12 programs for the TENS portion, and I believe there are like 5 - 10 programs for EMS. I prefer the TENS; EMS is a little bit too forceful for me at this point. I'll have my chiropractor adjust the settings on that part for me. After 1-1/2 months of intense shoulder pain and dealing with lateral Epicondylitis on top of it, I was actually able to sleep most of the way through the night this past weekend!! I was forgetting what actual sleep felt like without pain! Definitely a keeper and I recommend it to anyone who is on the fence about purchasing a unit like this. Best of all, the machine and the electrodes are FSA/HSA eligible, so if you have an account with either, you can just use that to pay for it. A receipt was not delivered with the unit, so I had to go into my orders and print out the invoice for both of my orders in case the IRS questions me about it. It feels so nice not to have to choke down more ibuprofen or naproxen. Those meds were starting to make my stomach hurt due to having to take them regularly. I don't need an ulcer on top of everything else I have going on! Thank you to Istim for making this wonderful unit!
B**9
Impressive Medical Grade TENS/EMS Unit!
I've owned the iSTIM EV-804 TENS/EMS 2-Channel Rechargeable Combo Machine Unit - Muscle Stimulator for just over 1 year now, and I couldn't be happier. Although I'm not using it as often as I did when I bought while going through PT, I still use it from time to time, and I'm always impressed by the number of settings and its overall versatility. This TENS/EMS machine is easily up to par with what I used while going through physical therapy, and the number of settings and options built in sets it apart from some of the cheap junk TENS units you'll find for $30.00 to $50.00 with only a handful of settings. If you want and need a pro-grade TENS/EMS unit, give the iSTIM EV-804 TENS/EMS 2 Channel a try. You won't be sorry.
D**K
Compact but powerful.
Make sure you charge this before using. It took almost 8 hours before the light went from orange to green. At first I was skeptical on how well the item would work. Set up was not very hard and finding the right mode was the kicker. Just make sure when you reach the setting right after ramp 2 you turn down machine. That's when i found the constant mode. All electricity all the time. It's now my favorite setting. The pads are well made and the wiring they give you is not hard to figure out so hooking every thing up was a couple minutes. I also saw a couple you tube videos to get the idea of the machine. I have used the machine and the same pads 4 times. It seems like they might stick well at least 2-3 more times. They do give you 8 pads with the machine. All in all I am impressed with this machine and it feels like I got value for the price. This was a quality purchase.
D**N
Had to call the distributor.
I like the unit and its range of capabilities very much. The packaging is nice well laid out and complete for the first user. The reason for my four stars on the value of money there are several other options there are more complete (electrode available) had a better value. As for ease-of-use once you kind of figured out and read The Complete Book it's still difficult but you have a better understanding of exactly what is expected of you. My biggest problem was the instruction book said that there would be a a blue light while charging which would turn green when charged. I had to make a phone call to California to the distributor to ask the question why the light was red for a long time. The answer, you have to charge a unit at least 8 plus hours for the first time not the two hours suggested in the book. The light finally turned green. I was a happy camper to see that the unit wasn't overheating it just took a long time to charge for the first time. I would strongly suggest spend the extra few dollars for this unit because the several options for therapy. This makes the unit more adaptable for multiple applications for healing the muscles. I definitely suggest this to friends who talk to me and seen this one.
H**D
Reduces muscle pain and helps tone targetted muscles
Absolutely love this device. My back and hip pain was caused by muscle strain and the pain is greatly reduced. The EMS is great for turning muscles back on after an injury and for targetting specific muscles. Not sure what took me so long to try this
R**R
GREAT Customer Service
I received the TENS/EMS about one week ago. I noticed both the center connector pins on the box were bent and there would have been no way to plug in the leads. Trying to do so would have only damaged the connectors more. I used the point of a letter opener and bent the pins back to a center position the best I could. I was then able to plug in the leads. It was hard the first time but the pins centered from lining up with the plug and it became easier to plug and unplug. I started using it but a couple of days later I decided I should let the seller know about this even though it’s working. Pins that have been bent are more susceptible to bending or breaking. I sent Everyway4all an email on Sunday and they responded immediately. They sent me a new unit Priority mail the following day with an envelope and self address paid label to return the one I had. That’s GREAT Customer Service! Now for the unit itself. This is my third and also my best TENS/EMS unit. It does exactly what they say it will do and it does it well. I bought this one because you can dial in the intensity rather than pushing an up or down button 20 or 30 times to select your intensity. This is also the first one I’ve had that let you adjust frequency width and rate while you are using it. My most recent one required me to stop the unit, make the adjustment, start the unit and push the up button 20 or 30 times if I just wanted to make one small change. I’m really glad I bought it.
J**A
Beginner's large muscle injury EMS settings within this review.
This unit allows user controlled EMS settings (not just TENS, and not just "programs"), however the max width is 300μS (microseconds). Beginner EMS settings for hamstring area muscle injury: Mode S, Use 1 channel - 2 electrodes, Ramp 4 seconds, On 8 seconds, Off 24 seconds, 300μS, 50Hz, 15 minute session duration, 2 inches of skin visible between electrodes, electrodes placed on (along the length of) the injured spot. SEE THE NEXT SENTENCE. ***The intensity level is controlled by a sensitive physical dial on top. FOR BEGINNERS the starting intensity must be less than 2 (out of 10). After feeling the sensation as too weak, raise the intensity only 0.25 (out of 10) at a time.*** For example, if after feeling a contraction you feel that 1.5 is too weak, raise it to 1.75 and wait for the next contraction. Then if you want it stronger raise it to 2, then a contraction, then 2.25, and so on. If you raise it from 1.5 to 4 you may be VERY startled. I am not a therapist or physician.
N**4
Long life
I purchased an iSTIM EV-804 TENS/EMS in 2021. Loved it worked really well. However, the output has decresed significancy. I tried new quality electrodes and the output is still not the same as it was when I purchased it.
H**A
high quality
highly recommend but the pads lose the gal quickly
A**A
Buon prodotto!
Lo sto usando da subito appena consegnato e sto notando dei buoni miglioramenti. A fine mese dovrò comunque sottopormi a visita neurochirurgia per problemi di protusioni legati a sversamenti nella colonna vertebrale oltre a varie infiammazioni. Però il dolore si è notevolmente attenuato e probabilmente anche l’infiammazione.
A**A
Brilliant medical-grade device for older adults. Simple and effective.
I purchased this on the advice of my GP to help with my mobility and pain management. At my age, finding a safe and non-invasive treatment is crucial. I use the EMS mode daily to keep my leg muscles active and fight off weakness, while the TENS mode is absolutely brilliant for melting away my neck and shoulder tension. The machine feels very sturdy, and adjusting the intensity via the rotary dials is incredibly intuitive and safe. It’s a powerful little gadget that has genuinely improved my day-to-day comfort. Highly recommend it to any seniors struggling with similar aches!
M**L
High Quality
The build quality of the iStim EV-804 is top-notch. It feels solid and well-made, with a rigid casing that doesn't feel thin or cheap at all. It works as expected i have no complains.
M**I
Un appareil qui vous veut du bien !
Suite a une rupture du ligament croisé a cause d'une chute en ski, mon kiné m'a conseillé l'achat d'un électro stimulateur dans l'objectif de rechercher la réactivation du quadriceps pour remarcher normalement au plus vite. Cette appareil m'a permis de retrouver cela très rapidement. Même mon kiné était impressionné ! 🙂 Cerise sur le gâteau, le station est capable de réduire voir supprimer la douleur. C'est un énorme soulagement ! Bref, un appareil que j'utilise quotidiennement. Très content de mon achat
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