The first one I received worked very well for two weeks, sound quality very good. But now, the car radio is off with the ignition, the issuer no, it had to happen, happened: I forgot to unplug the unit which continued to run for 3 or 4 hours, result: thingy blocked more nothing to do. Note also that the remote control has never functioned: even if it seems stupid to have a remote control in such a short distance, for navigation, it changes life.
In short, service nickel that returns me a second immediately. This one works fine until now, too remote, but the sound is of much lower quality (saturates easily).
So to conclude: it costs 10 and the AC is, no more, no less. It's great when it works and ca troubleshoots well.