Features: Supports Bluetooth hands-free calling Supports A2DP function， Stereo Bluetooth and FM transmitter Support MP3 format， 206 frequency points Support Power 9-24V， supply after opening， automatic back to even， automatic into the matching condition. Automatic power-off memory function Supports USB， SD card (1GB-32GB)， support MP3/ WMA/FLAC music to format. Can charge for various intelligent mobile phone， USB output 5V/ 500mA. Supports to connect the computer to download function， can directly connected to the computer to download songs SD/ TF card. With 21 key multi-function infrared remote control， can realize the digital song (directly press the song number， (digital frequecy operation by pressing the number then press CH+)， remote dial (press the number then press the green button)， long press button to select a folder function.Specifications: Roted voltage: 12~24V Power consumption: 1W Work temperature: -20~50�� Frequecy response: 20Hz-15Khz Bluetooth version: V2.1+ EDR Bluetooth audio process with A2DP function (Advance Audio Distribution Profile) Blutooth transmission distance: 10-15m FM emission frequency: 87.5~108MHz USB charging port: 5V/ 500mLPackage include: 1 x Car MP3 with FM Transmitter Bluetooth Steering Wheel 1 x Remote controller 1 x Steering Wheel Remote controller 1 x User Manual