Features：Bluetooth hands-free talking and FM radio functionsHigh quality sound with D.S.P solution for echo cancellation and noise suppressionAutomatically converting between calling and music playing， also last memoryYou can directly control MP3 player by the button for picking up / hanging on or change FMSupports micro SD / SD card / USB for playing musicCan connect with two Bluetooth devices at the same timePowered by car charger for MP3 player and CR2032 battery for controller (included)Suitable for all the audio devices with Bluetooth Specifications:Bluetooth audio process: A2DP (playback)Bluetooth transmission range: 10mMicrophone range: 0.5-2mSupports format: MP3 / WMAFM transmission frequency: 87.5-108MHzFrequency respond: 20Hz-15KHzSNR: More than 60dBDegree of distortion: Less than 0.1%Rated voltage: 12VRated current: 90mALimit voltage: 9-26VPower consumption: 1WWorking temperature: 0~50℃Package includes:1 x Car Bluetooth FM Transmitter1 x 3.5mm to 3.5mm Adaptor Cable1 x Remote control1 x Steering Wheel Remote Control1 x User Manual