Four Modes of Music Playing:1. Playing music on U-disk.2. Connect Bluetooth to Play Music.3. TF Card Plays Music.4. AUX External Sound Source Plays Music.QC3.0 Fast Charging Function:1. QC3.0 fast charging socket.2. USB 2.4A charging socket.Display:1. Display the spectrum of sound wave.2. Display automobile battery voltage.3. Display FM Frequency.4. Volume display.5. Song Name Display.Hand-free calls:1. One-key Bluetooth Hand-free Call.2. Support answering/hanging up/redial.Specification:*Model: T43 Bluetooth V 4.2*Working Voltage: 12V~24V*USB interface: 3pcs (QC3.0, USB2.4A, U disk socket)*Output Current: QC3.0 Fast Charging 6.5V-9V 2A, 9V-12V 1.5A; Standard Fast Charging 2.4A, 1A*Output voltage: 5V-12V*FM transmission frequency: 87.5-108 MHz*Conditions of use: General vehicle type, power supply of automobile cigaret lighter.Package content:1*Car MP3 Player1*Audio Cable