Features: 1.Multiple Playback Modes: Four music playback modes: 1. Via Bluetooth. 2. Via micro Storage Card (support MP3, WMA, WAV format). 3, through the U disk. 4 Via 3.5mm sound cable. 2.Bluetooth FM Transmitter: 1.8 inch screen on board battery voltage level, also able to display caller ID, volume, FM frequency while playing music. 3.USB Charging: With 2 USB charging ports, you can connect a USB flash drive to play music and fully charge your device in a short time. 4.Simple Operation: Wireless remote control, insert the car bluetooth FM transmitter into the cigarette lighter socket, turn on the car FM radio and pair with the transmitter. 5.Safe: Including overload, short circuit and overvoltage protection, safe to use, light and compact, easy to carry. specification:Item Type: Bluetooth FM Transmitter Material: ABS Rated Voltage: 12-24v Limit Voltage: 9-32v Output: Maximum 5V 2.4A Operating Temperature: