Wireless Bluetooth Remote Control Hands-free Car Mp3 Player KitLCD display， song name， track， calling number displayExcellent sound quality with D.S.P solution for echo cancellationNoise suppression(CVC)Broadcast music stored up by the automobile through car stereo systemSupport USB disc. SD CardSupport MP3/WMA music formatSupport two phones connection BluetoothFull duplex， DSP(digital signal processing)technology21 keys remote controllerFor other compatible music devices or your MP3/MP4 players， use the supplied audio line cable to connect from the other device's "Line out" to the FM Transmitter "Line in"3.5mm to 3.5mmm Adaptor for your MP3/MP4 player or other compatible audio device that have a 3.5mm Audio jackSupport A2DP playbackSpecification:Limit voltage:9-26VPower consumption:1WWork temperature:-20-50 Celsius degreeAudio Format:MP3/WMASNR>60dBVersion Bluetooth: V2.1+EDRBluetooth transmission distance:10mMIC effective range:0-2mTransmission frequency:87.5-108MHzReception frequency:20Hz-15KHzThe charging output specification:DC5V-1AItem Color: BlackItem Dimensions: 25 x 18.5 x 9cmPackage includes:1 x FM Transmitter Bluetooth Car MP3 Player1 x 21 keys Remote controller1 x CableNote: Due to the difference between different monitors， the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. Thank you!