NURSAL Tens Unit Muscle Stimulator Machine - Dual Channel Electronic Pulse Massager, 25 Modes & 40 Intensities Tens EMS Machine for Pain Relief Therapy with Tens Unit Replacement Pads & Travel Case

Good Quality easy to use and works perfectly.

Funciona, y aunque llego un par de días tardes estoy muy muy contento.

I'm amending my review, because I believe the first device I received probably had issues, and after speaking with the vendor, they provided another one to try and it has performed very well. I wish it had snap on pads, but that's just personal preference. Original Review This has lot's of good features and a nice case. The amount of controls were great for what I wanted, and I was particularly excited about the dials for intensity, opposed to the typical push button. Having said that, the dial seems to have been the thing that broke. I would turn up the intensity but then it would go back to 0 after about 4 or 5 clicks. Maybe mine was just a dud, but I ended up having to return it.

I purchased separate VNS ear clips. I had trouble because the ear's high electrical resistance didn't allow the unit to sense that it was connected. The intensity reset to zero when I tried to increase it. The ear clips touch the skin over a small area, unlike the larger skin patches that one would use for like back pain. The small area affects the resistance of the connection to the body. The unit will not allow the intensity to increase until it senses a connection. I placed a 100K ohm resistor across the leads of the ear clip, and the unit could sense the connection, which worked well. This solution may not be for everyone, but I noticed another reviewer had the same issue using regular patches. I don't know if I would need the resistor if I pre-wiped the ear with a saline solution around where the VNS ear clips touch. It would be good if the device were more sensitive to higher body electrical resistance.

Great for post shoulder surgery