Car USB Phone Charger Bluetooth MP3 Player Car Bluetooth Hands-freeFeature:Bluetooth hands-freeSupport Bluetooth stereo music playSupport navigation voice broadcastEcho cancellation and noise suppression (CVC) technology when callingSupport USB output 5V\/2.1A、 fast chargingStereo Bluetooth and FM transmission technologyWith memory function in case of power-downSafety hammer functionBluetooth transmission distance is 10 metersSpecification:           Working Voltage        12V ~ 24V            USB Output        5V\/2.1A            Working Temperature        0 ~ 50\u2103            SNR        !#!amp!*!gt; 60dB            Distortion Degree        !#!amp!*!lt; 0.1%            Frequency Response        20Hz ~ 15KHz            Left and right channel separation        !#!amp!*!gt; 60dB            Bluetooth version        Version 2.1            Bluetooth audio processing        With A2DP(Advance Audio Distribution Profile)Function            Bluetooth transmission distance        10M            Effective distance of Bluetooth microphone        0.5 ~ 2M            FM Transmitting Frequency        87.5 ~ 100 MHz            Emission frequency modulation mode        Stereo Digital PLL   Package Included:1 X Car Charger