Belifu 4 Independent Channel TENS EMS Unit, 24 Modes,30 Level Intensity Muscle Stimulator Machine, Rechargeable Electric Pulse Massager with 10 Pads&5 Set Leads Wires, for Pain Relief Therapy(Black)

Wow! Belifu really came through! They reached right out to me and offered to send me a replacement, a refund or another one of their products to make things right. I have to say that their customer service rep was so sweet and kind and wanting to fix things ASAP. I opted for a replacement unit because I really did want this to work and their TENS routines are top notch, and it works great! I love-love-LOVE the TENS and EMS routines on this unit. I also love the 4 channels being independent and so you can mix and match 4 routines across 8 electrodes and it feels a-ma-zing! I have to say that belifu really put some thought into their routines. It feels like they did some testing and figured out what actually feels good and helps with pain or muscle relaxation rather then just slapping some random patterns into their unit. I will leave my old review below, for history sake, but rest assured, if you have any problems, please reach out to Belifu to make it right, they are so nice and helpful and just seemed to want to make things right. I would recommend this brand of TENs unit 100%.*Review updated, see above!* - Well, this didn’t last past the first charge. Shame too, because I actually liked the various routines it offered compared to another brand’s unit and the fact it is truly multi-channel.Either the USB-C port, internal battery charging circuit or battery itself are defective. I tried charging it when I first got it and it didn’t appear to be doing anything, so I went ahead and tried it out with whatever battery was left and while it felt really good on some of the settings, and most importantly is truly a multi-channel TENS unit, it only lasted an hour or two before it stopped taking a charge. I busted it open and carefully removed the battery and wired it to an external power supply (don’t try this at home, I am electronics technician by education and profession) to get a little more use out of it, but it’s not really worth all the effort of all that (though it does actually power up and work that way), so in the bin it goes. All of the markings on the IC’s inside the unit have been sanded off as per typical Chinese electronics, so fixing it would be more trouble than it is worth. Buyer beware. It may work for a bit and then the battery dies and it wouldn’t take a charge.

I've used tens therapy devices for years. I bought this one to replace my 2.5 year old one. This one has more presets than my older one (12 vs. 9), more intensity and many more discreet adjustments... Plus it has an actual EMS mode (12 presets also). My old one only had a tens mode which it did well but this one is definitely a step up, not only in adjustments and modes but it has 4 channels instead of just 2. It comes with a USB-C charging cable which is another surprise, a good selection of pads, 5 sets of leads... 1 of which has 2 sets of connectors... I didn't know that was a thing but wow! This was the first thing I tried out. It made for a simpler setup using just 1 lead with 2 sets of pads to use on my neck. I was able to attach the device to the waist of my sweats with the built in hook that I didn't know about (another nice surprise) and get things done around the house while my neck was being treated with tens therapy. This was a godsend.BATTERYAfter more than 30 minutes of use the battery still shows as fully charged so that's awesome. My older one would be about 30 % depleted by this point... At least after 2.5 years but I don't think it could have completed when it was new. I'll have to update to better gauge battery life but so far I'm very, very impressed.USER INTERFACEThis couldn't be more simple. M+ & M- change as mode (12 of each tens & EMS), T changes time (up to 80 minutes), I+ & I- change intensity accordingly using a discreet control my older unit was missing which switched from one step to another with a huge leap that was not useful or wanted in some circumstances. To switch from tens to EMS just tap the tens/EMS button. Other than the lower button, the only other button is CH which allows you to switch from one to another.CONSSo far the only con I've found it's that it should have come with at least 2 sets of the small pads. This is the size you want if you want to treat your neck which I did/do. Luckily I had an extra set BUT any set of pads should come with a minimum of 2 sets of each size of pads.Honestly, I think I'm going to order another as a gift to my brother. He's a competitive runner (I'm the cyclist in the family). I think he'd love this if not for massage/sore muscles but for a seriously quality warm-up.So far... I LOVE THIS THING!

I like the price. I bought it solely for the TENS unit functions. The fact that it will provide more channels than I could possibly need is a bonus. There are four channels, which translates into being able to attach four wires, each with two electrodes. It does both TENS and EMS, but I only use the TENS functions. It has lots of pre-programmed settings for each mode. The electrode adhere to the skin well and have plenty of power. The rechargeable battery (via USB-C cable) lasts a long time.It is not without problems.The instruction pamphlet is printed in extremely small font. Almost impossible to read! It is also lacking in information. For example, there is an extra wire lead that will take four electrode pads, but there is no mention of it in the instruction pamphlet. Typically the wire leads on TENS machines only use two electrodes.The pre-programmed settings work, but they are confusing and there is no technical explanations of them. They simply have small icons that look like acupuncture needles, hands doing various massage techniques. What do they all mean? It's just not explained. The user is left to sample each one and find the settings that work. Don't get me wrong. You can find settings that work for you.Once you have identified the settings and electrode placement that work for you, it would be great if the unit would remember those settings for future use.

Excellent !!!Well packaged, fully functional, complete, all the cables and attachments included, the battery was charged, started right away, it works fine.Thank you for a seamless procrss, from order to delivery !!!😀