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 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(no include TF card) Item Size: 3.8*4.6*7.8cm / 1.5*1.8*3.1'' (L*W*H) Net Weight: 0.035kg / 1.2oz Package List: 1*Car player 1*English user manual