Description Features:Bluetooth hands - free calling.Support charging the mobile phone. Phone will never have no power in the car.Echo cancellation and noise suppression technology. (when car is with speeds of up to 100 yards, there will have no echo by using the Bluetooth phone.)Stereo Bluetooth and FM transmitter technology.Support USB.Support MP3, WMA format music.Automatic power-off memory function.Car cigarette lighter power supply directly.For iPhone 6 / 6 Plus / 5s / 5c / 5 / 4s / 4;For Samsung Galaxy S5 / S4 / S3 / S2 / Note 4 / 3 / 2;For HTC One / M7 / M8 / M9.Specifications:Type     :Bluetooth Handsfree Phone Car MP3 FM transmitterMaterial     :PlasticQuantity     :1 PcsColor     :BlackBluetooth  Version     :2.1 EDRBluetooth Sound Processing     :A2DP function supportedPlay Format     :MP3 WPABluetooth Transmission Distance     10MEffective Range     :0.5-2MFM Frequency     :87.5-108MhzFM Mode     :Stereo digital PLL frequency lockingEffective Range     :0.5-2MRated Work Voltage     :12V-24VLimit Work Voltage     :9-26VUSB Output     :5V/2.1AFrequency Reponse     :20Hz-15KHzSNR  >60dBSize     :11.5*2.6*1.8cm (L*W*H)Net Weight     : 0.035kg