The FM transmitter simply plugs into the 12V car socket. Then, one car radio to a free frequency at playing no radio. This frequency is then adjusted to a car transmitter and then transmits this tone and calls on the car radio.
In this model, the coupling can be done manually by jack and Bluetooth. The transmitter supports A2DP and can therefore also transfer music via Bluetooth.
In practice, the transmitter is working properly. The music has a good quality (better than the version previously used with the "audio cassette") and you also need a hands-free device. Sound transmission in both directions is good. One understands the calls very good and also the spoken is well understood. I have all tested well on the highway and to 120 Km / h in the small car it is no problem about the phone calls are a little more difficult to understand, but also with other headsets previously tested was the case, why I depart for no points.
So you can conjure up with little investment music from your phone to the (old) sound system in your car and still has a speakerphone while. The playback of USB and SD card is possible. The build quality, I can not complain, the transmitter does not look cheap. The operation you have to get out quickly. I am very pleased overall with the transmitter.
