Short delivery time, goods, however, was without equipment packaging (unit with manual was only in a PE bag) supplied in a bubble envelope. The sound quality is surprisingly good according to the price, the quality of reception is greatly dependent on the position of the car radio antenna, the shorter the distance to the unit, the less background noise is audible. 8 and 16GB SD card (both Kingston) as well as 8GB and 16GB USB Stick's (both Sandisk) media are easily recognized. The service is, however, more than "getting used to". Smoking and phone calls at the same time while driving is safer than traffic to switch here a MP3 Directory ... My conclusion: in no way replaces a car radio with an SD card slot and / or USB connection, the price / performance ratio is however unbeatable.