SODIAL(TM) Bluetooth Car Kit FM Transmitter MP3 Player Steering Wheel USB SD MMC Card Black Built-in Bluetooth with FM transmitter Support call ID show and hands-free Function Can select the phone numbers ,song catalogue and FM channels by remote controller Excellent sound quality with D.S.P solution for echo cancellation & noise suppression If there is a calling in or out, it can stop music and switch to calling automatically.Play USB disk SD/MMC Card Music directly