Support SD/USB card. Talking in hands free.Automatic last memory.High quality A2DP streaming.Car cigarette lighter power supply.Support MP3 music format music playing.Listen your music in the car tune base FM.Stereo Bluetooth and FM transmitter technology.21 keys remote controller and steering remote controller.Supports the remote control to meet dials or pick up telephone. Broadcast music stored up by the automobile through car stereo system. Play music，long press PLAY button transmitter 4 seconds can realize not code replay function.With multi-function remote control，can realize number song selection and choose frequency.Excellent sound quality with D.S.P solution for echo cancellation & noise suppression(CVC). When telephone coming the music automatic cut over to telephone conversation condition.Support two cellphone connection bluetooth，the power supply after opening， automatic back to even，automatic into the matching conditions. Specifications:SNR:>60dB.Net Weight:162g.Rated Voltage:12V.Limited voltage:9-26V.Power comsumption:1W.Bluetooth Version: v2.1+EDRFrequency response:20Hz-15KHz.Work temperature:-20 to 50℃.Weight Included Package:258g.Dimension of LCD Display: 1.5".FM Emission Frequency: 87.5-108MHz. Bluetooth Voice: With AD2P(Advance audio distribution profile).NOTE:This product can be compatible with most of the mobiles，however，some functions may be invalid due to difference of mobile.In addition，specifications are subject to change without notice for further improvement.Package Included: 1 X Car Bluetooth FM Transmitter 1 X steering wheel remote controller 1 X Remote Control 1 X User's Manual