FM transmitter with LED display window and LINE audio input with
Independent Bluetooth start /shutdown button which Support playing music
by USB disk. It also Support MP3/WMA music format, Answer /hang
up/reject/redial via Bluetooth and bluetooth stereo music play. It
enhances Call, Echo Cancellation and Noise Reduction(CVC). Dual USB
output voltage which provides power to other devices up to 5V/2.5A with
Automatic memory function of power failure frequency point and display
of on-board battery voltage.