Usage Tips:Car CD is the current mainstream, and digital music, as a force, is becoming more and more popular with its function diversification and personalization. Different from ordinary car MP3, our products have their own special design. I believe that more and more riders will choose our products to replace your car CD multi-disc player! The configuration of the car is too low, there is no CD player or multi-disc player, and I cannot accept the shortcomings of traditional car MP3, such as easy interference and poor sound quality. I want to listen to my favorite songs. The car does not support USB and SD, and the mobile phone I didn't listen to the songs, and I didn't want to buy a whole disc for a few favorite songs. I felt that it was too troublesome to buy, burn, change, and select songs frequently. The CD player is a mechanical structure, it is easy to jam on bumpy roads and it is easy to break down; it is not safe to answer the phone while driving; we have thought of it for you, and this is the birth of our product important meaning. I hope that the first song is my favorite. It is easy to find songs and change discs. Listening to songs and answering calls will not affect driving. Pursue a higher-quality music car life. Professional car digital disc box, we provide such a convenience: let you listen to the latest songs with your car at any time, and spend the least cost (just use U disk and SD card or mobile phone), CD key control, High-fidelity lossless playback, completely comparable to CD quality! Supported decoding formats: WAV /MP3/APE/WAVE/FLAC (lossless format) Support external: 1 USB2.0 /AUX Frequency Response: 20-20K Hz Bluetooth version 5.0BR/EDR (including compatible versions below 5.0) Distortion: Less than 0.05% Signal-to-noise ratio: Greater than 90dB Standby power consumption: Greater than0.1W Working temperature -20 - +70℃ Working power supply: DC11-15V (generally taken from t