Call line identityEcho cancellation and noise removalStereo Bluetooth and FM emission techniqueSupport USB/SD Card(Memory card Not Included)Support MP3 and WMA format .Save MP3 file to U port. Plug in U portAuto power-off memoryPower supply from 12V car cigar lighterBluetooth version: 2.0Rated voltage: 12V Limit voltage: 9-26VPower consumption: 1WWork temperature: -20~50¡ãCPlay format: MP3 WMA (optional) SNR >60dBDistortion factor<0.1%Frequency response: 20Hz~15KhzSeparating size of right and leftChannels:60dBBluetooth audio process with NO A2DP function Advance AudioDistribution Profile)Bluetooth transmission distance: 10~15mPackage included:1 x Bluetooth car mp3 FM modulator，1 x Audio cable，1 x Remote controller