1CVC intelligent noise reduction, high resolution, high performance stereo, no stuck, support MP3/FLAC/WMA/APE and other lossless music. 23.1A double USB expansion, intelligent fast charging. Charge the mobile phone for a while on the way to work, full charged for a whole day. 3Bluetooth 5.0 HD call, compatible with for Android/IOS systems. Background noise reduction processing, more clear music and mobile phone call effect. 4U disk/TF card can be inserted and played. The car radio frequency and MP3 frequency can be adjusted to be consistent to play songs in the U disk /TF card. 5Voltage detection, safety warning, HD display, clear safety reminder. Too low or too high voltage will lead to battery damage and unable starting of the car. 6Bluetooth hands-free, one key to answer. Support hands-free call, convenient and easy to deal with the car calls. 7Compatible with mainstream music and map software, easy to use. 8Voice navigation, clear route warning. Music sound automatically decreased when navigating, and restore when there is no navigation. 9With memory function in case of power-down. Boot up to automatically connect and play the song played before. 10Trustworthy intelligent chip. Intelligent master control chip, eightfold circuit protection, more secure to use. 11Universal for all models of cars and trucks. Compact and delicate, strengthen anti-slip shrapnel on both sides, firm and stable.