SPECIAL DESIGN --- Large key for easy operation; 1.77 Inch large LCD backlight display song name/ incoming phone number and shows your car's battery level when car start; Can rotate the LCD display screen in 270-degree gooseneck for optimal viewing comfort | NOISE CANCELLATION & HI-FI SOUND QUALITY --- Noise-cancellation technology dampens the road noise and gives you clear, crisp sound for hands free calls. High Quality Music Streaming ensures crystal clear sound for listening music and hands-free calls | INTELLIGENT AND FAST CHARGING --- Input 12-24 V, output 2 USB ports (QC3.0 & 5V/2.4A) : Bluetooth car charger can intelligently identify devices. Smart car charger QC 3.0 USB charges up to 4x speed of the conventional car charger. Built-in over-current, over-voltage, intelligent temperature control and short circuit protection | 4 MUSIC PLAYING --- The Bluetooth adapter for car supports 4 music playing modes, work with TF card, U disk , Bluetooth and Aux line; ile Support Type: MP3/WMA/APE/FLAC/WAV | Hands-free Calls --- All in one button for hands-free calls: answer/hand up/recall make you seamlessly switch between incoming calls and music. And this Bluetooth car adapter supports Siri/Google Assistant to make phone calls