Car MP3 Audio Player Bluetooth FM Transmitter Wireless FM Modulator Car Kit HandsFree USB Charger for iPhone & for Android hot sellingFeatures: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.Specifications:Type: Bluetooth Handsfree PhoneRated Working Voltage: 12V-24VLimit Working Voltage: 9-26VOperating Temperature: 0 to 50 degreesSupport Playback Format: MP3， WPAFrequency Response: 20Hz-15KhzBluetooth Version: 2.1 + EDRUSB Output: 5V/2.1ABluetooth Sound Processing: with A2DP (Advance AudioDistribution Profile) Color: BlackNet Weight: 51.1gSize:11.5cm (Length)Package Includes:1 x Bluetooth Handsfree Phone1 x 3.5mm Audio Cable1x user manual