I bought a 160$ muscle Stimulator called PowerDot 2.0 by Therabody. Took me hours and a visit to a tech help center just to get the thing to pair with my phone. Finally, got a chance to try it and they wouldn't take a return as they said it had passed the sellers return period. So, never got the thing to work, can't return it and triple checked everything but still no luck. Despite PowerDot's ratings from Physical Therapist, the thing is flawed and ends my relationship with ebay.