Features: 1) Wireless transmission 2) Changes audio signal into FM signal and transmits wirelessly to the car speaker and play 3) No need to change any original equipment of the car and is convenient and economic 4) OLED display and MP3 / WMA play modes 5) Supports LRC file and ID3 6) Recording function: long time recording with built-in microphone 7) Storage function: hard disk with USB 8) Auto recharge with USB 9) Capacity: 128MB, 256MB, 512MB 10) Suitable for all types of cars, on need to make any changes to original equipment