On the transmitter side, I have so far only my phone (a Sony Ericson), with the B-Speech harmonizes adapter wonderful, tried. The charging function of the B-Speech receiver is conveniently implemented via a mini-USB port. I have this connected via a cigarette lighter USB adapter and the included USB cable for charging. Loading and playing at the same time work (then flashes red / blue). Without Ladeadapter the B-Speech blinks blue and keeps loose a whole day in the car without reloading from ...
The sound quality is (according to the input of the amplifier) flawlessly, thanks to the latest Bluetooth A2DP streaming bit rates and clean analog 3.5mm stereo jack allows.
So if a good investment (whether in the car or at home), has to be connected, can access safely.