1) Work Input Voltage: DC12V 2) Allowable work Voltage: DC9V-24V 3) Work Electric Current: 80mA 4) Max Output Electric Current for USB: 500mA 5) Work Temperature: 0-50 6) S/N ratio: more than 60dB 7) Separate ratio: more than 60 dB 8) Anamorphic ratio: less than 0.1% 9) Support 32-320kbps MP3 files and 32-384kbpsWMAfiles 10) Bluetooth version: V2.0, support A2DP agreement 11) Bluetooth Transmitting distance: less than 10m 12) FM channels: 87.5-108.0MHz 13) FM Transmit Level: 100dB??V 14) Support :usb key and SD card Our factory accept OEM/ODM order,manufacture the products according to your requirements. Professional Engineers to realize your ideas. Please feel free to contact with us for doing bussiness.