Since I thought I'd be saving money over a bluetooth I succumbed and bought a JJ. I attribute it to a momentary lapse in normally good judgement. It's not only a badly designed product, it's actually more of a driving hazard than using a cell phone without a hands free device. The jack falls out of the phone easily. The phone holder doesn't allow you to open your phone and doesn't stick to the dashboard, falling to the floor of the car. The cost of batteries alone eat up any savings over a bluetooth and the customer service is non-existent. Whatever you do, DON'T BUY IT!