Features: 1. Supports bluetooth handsfree, built in microphone, safe and convenient to answer the call, call when the noise processing of CVC, wind noise supression. 2. Supports A2DP function of mobile phone via Bluetooth directly high-quailty mobile phone music.(Bluetooth stereo) 3. The power supply after opening, automatic back to even, automatic into the matching condition. 4. Supports USB, SD card (1GB-32GB), support MP3/ WMA/FLAC music to format. 5. Can charge for various intelligent mobile phone, USB output 5V/ 500mA. 6. Supports to connect the computer to download function, can directly connected to the computer to download songs SD/ TF card. 7. 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: 1. Roted voltage: 12~24V2. Power consumption: 0. 5W3. Work temperature: -20~504. Frequecy response: 20Hz-15Khz5. Bluetooth version: V2.1 EDR6. Bluetooth audio process with A2DP function (Advance Audio Distribution Profile) 7. Blutooth transmission distance: 10-15m8. FM emission frequency: 87. 5~108MHz9. USB charging port: 5V/ 500mL10. Package size: 250x150x20mm11. Color: black12. Weight:0. 179kg13. Material:plastic key word:car MP3,vehicle-mounted MP3,car bluetooth hands free,bluetooth,plastic