Features: 1.Support Bluetooth hands-free phone calling . 2.Music will be played directly while the mobile phone is connected. 3.Built-in dual USB 5V / 4.8A ,5V / 1A output, 4.8A USB port support smart charging, it is available for charging most kinds of devices in car. 4.LED screen, can display frequency points. 5.English voice number prompt. 6.Support TF memory card and U disk 7.With a support of FM channels, this car MP3 wireless FM.transmitter lets you take a break from your regular music. 8.Plug the MP3 player into cigarette lighter of your car directly, easy to use and carry. 9.Support power off memory function. Specifications: Rated operating voltage: DC12V-24V Working Voltage limits: 9-26V USB1 Output: 5V/9v /12v 4.8A USB2 Output: 5V/1.0A , read USB Flash music. Working Temp: 0-50 Support Play format: MP3 BT Version: Version 5.0+EDR BT sound processing: A2DP(Advance Audio Distribution Profile) BT transmission distance: 10M BT microphone effective range: 0.5-2M FM transmission frequency: 87.5-108Mhz Support TF card/ U disk : Max 32G Support file type : MP3/APE/FL WAV/WMA Package included: 1 pcs* Bt Car MP3 Player FM transmitter