Features:Support to answer the telephone calling via bluetooth and its build-in microphone.Phone charging. Never make the mobile phone out of power.Weaken the noise and echo especially when the car in the fast running speed.Stereo bluetooth and FM transmitter technology.Support TF card.Support MP3 file format.Auto power off and memory function.Functions:Support multipoint connections: can connect two phones at the same time.Support mobile's A2DP function. Music will be played directly while the mobile phone is connected.Mobile phone can be connected automatically when the device turns on.Built-in FM transmitter.Support USB disk and Micro SD card， support TF card.Excellent voice quality， use the DSP (digital signal process) technology to echo cancellation.Switch to hands-free mode automatically from music playing status when receives an incoming call.Dual USB charging ports for charging iPod/iPhone， Samsung， iPad， Nokia and other mobile devices(Output 5V/2.1A)Support 12-24V voltage from the car cigarette lighter.Specifications:Bluetooth-Bluetooth Version: 3.0 + EDROutput Frequency: 20Hz-20KHzSensitivity: -42 db+ /3 db 360Voltage: 5V +/-0.5Frequency: 2.402 - 2.480 ghzEffective Range: 5 MetersRF Output: 4 dBmFrequencies:Frequency Range: 87.5-108.0MhzEffective Range: 2MTransmitter:Rated current: 90mAPower Consumption: 1WWork Temperature: 0-50 degreesSupport File Format: MP3/WMAUSB Charge Output: 5V/2.1AMusic format: MP3 formatUSB Maximum support: 32GMicro SD Maximum support: 32GTransmit Distance: 10mPackage Includes:1 x FM Transmitter Car USB Charger1 x User Guide(English Version)Notes:Due to the light and screen setting difference， the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Buying is Earning in Our Store!