Pain relief
Works as advertised. Rapid relief for chronic pain. 1 minor snafu: I ordered  a 5v power bank, phone charger type to use with this. It does not have enough sustained power to operate this. It does operate just fine with usb plugged into my 240w Jackery power bank. This is helpful for our off-grid camping. The seller was very helpful and sent additional 12v adapters.
Rating: 5 stars