Features:

Support Bluetooth hands-free phone calling via its built-in microphone. Support A2DP function. Music will be played directly while the mobile phone is connected. Built-in dual USB 5V / 4.1A output, 3.1A USB port support smart charging, it is available for charging most kinds of devices in car. LCD display of frequency and voltage. English voice number prompt. Support SD/TF memory card and USB flash drive (1A USB port) reading, can play music files on MP3/WMA/APE/FLAV/WAV format. With a support of FM channels, this car MP3 wireless FM transmitter lets you take a break from your regular music. Plug the MP3 player into cigarette lighter of your car directly, easy to use and carry.     Specification: Type: Car MP3 player Material: ABS Quantity :1pcs Item Color: Black Display Color: Blue Bluetooth Version :Bluetooth 4.0 (support A2DP/SBC/AAC/HSP/AVRCP) Files Supported: MP3/WMA/APE/FLAV/WAV FM Frequency Range: 87.5-108.0MHz SNR :85dB (FM: 65dB) Effective Distance:5m / 16.4ft Working Voltage:DC 12V-24V USB Output :5V / 3.1A (Smart IC), 5V / 1A Port :2*USB 2.0; 1*TF card input, up to 32GB max Item Size: 3.8*4.6*7.8cm Net Weight:0.035kg     Package:   1*Car player 1*English user manual   Note: the car radio and the FM device should be adjusted to the same frequence