1.Talking in hands free2.LCD display， song name ，track， Calling number display.3.Supports A2DP playback4.Excellent sound quality with D.S.P solution for echo cancellation.5.Noise suppression(CVC)6.Broadcast music stored up by the automobile through car stereosystem7.Support USB disc. SD Card8.Support MP3/WMA music format9.Full duplex，dsp(digial signal processing) technology10.21 keys remote controller and steering remote controller11.For other compatible music devices or your MP3/MP4 players， usethe supplied audio line cable to connect from the other devicer's "Lineout" to the FM Transmitter"Line in"12.Included in this product is a 3.5mm Adaptor for your MP3/MP4player or other compatible audio device that have a 3.5mm audio jack Specification:1.Item: Hands-free Car Kit Bluetooth FM Transmitter2.Limit voltage:8-36V3.Power consumption:0.5W4.Audio Format:MP3/WMA5.SNR>60dB6.Distortion:0.1%7.Version bluetooth: BlueCore 2.08.Bluetooth transmission distance:8m9.Mic effective range:0-2m10.Transmission frequency:87.5-108MHz11.Reception frequency:20Hz-15KHz12.The charging output specification:DC5V-1A13.Size: approx.26cmx4.4cm/10.2''x1.7''14.Color: BlackNote: Due to the difference between different monitors， the picturemay not reflect the actual color of theitem. Thank you!Package includes:1 x FM Transmitter Bluetooth Car MP3 Player1 x 21 keys Remote controller1 x Cable