Charging &Power: Automatically detect the charging device and charging environment, match the optimal current, display output current value;power supply for other devices.Music Play: Can automatically play and transmit the MP3 files of USB driver, Micro SD card directly, Supports dual USB output voltage..Bluetooth Communication:Bluetooth version: 2.1+EDR. Simply paired your phone with the Bluetooth FM Transmitter and its hands-free system can set free your hands during answer the calls and let you safely drive.Sound Quality: Excellent hi-fi stereo sound quality. High-performance built-in microphoneCompatible Modes: Apple , Samsung, HTC, LG, Sony, Motorola, Nokia, ASUS, Microsoft & More Smartphones, Tablets & MP3 Players and other mobile devices.