Review (1/5): Don't bother clicking the BUY button.
Really, don't even bother clicking the BUY button. First, I opened the box to see a product much smaller than shown on line. That should have been the first clue about the quality. Second, I followed the instructions to begin use and found that the remote's battery was dead. Not such an issue, after all I'd been interested in the product based on the reviews and the notion of having a wireless device.
Right. So, I attached the electrode portion to my back as instructed, and hit the starter button – and you guessed it, nothing. Not vibrations. No sensation. Nothing. Zilch.
I'm really surprised this device got any stars above 2. It's back to Amazon for me!