ZFLIN 4-in-1 CAR G7 Bluetooth FM Transmitter With USB Flash Drives /TF Music Player Bluetooth Car kit USB Car charger (Golden) Charging&Power:Automatically detect the charging device and charging environment, match the optimal current, display output current value;power supply for other devices, the maximum output 5V/2.5A. Automatic memory function of power failure frequency point. 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 microphone with Echo cancellation and noise suppression (CVC) technology which can offer your clear talking and wonderful music.Bluetooth sound processing:A2DP Compatible Modes: Apple , Samsung , HTC , LG , Sony , Motorola , Nokia , ASUS , Microsoft & More Smartphones , Tablets & MP3 Players and other mobile devices.