Bluetooth FM transmitter: send the music of mobile phones / U disk / TF card to car audio. Fashion and simple design. Car charger: charge mobile phone/tablet through the USB interface, max output up to 2.5A. Bluetooth hands-free function. Car USB, can read via USB U disk, or via TF card slot. Hi-Fi stereo, adopt the DIGITAL, PLL phase-locked loop technique. LCD display FM frequency and voltage, more convenient to use.