Finally an FM transmitter, which actually transmittet a rear roof antenna. Does not create any device. Extensive connections for almost everything. SD card, USB flash drive, MP3 player. (Connecting cable with 2.5 mm to 3.5 mm jack on the device for MP3 players here). Comfortable track selection via direct credit card remote control, otherwise the device back and forth depending on a switch that you can operate times consecutively without problems also 200. 4 stars for the hardware. Sound is not just extremely hi-fi standards for more than 2 stars. But those who do not have high claims provides, can live with it. For the low purchase price not too bad.