It is a small round AUX jack similar to headphones. There is a special connecting cable connected to the AUX jack, which comes with the car. About 50 centimeters long, this can only be connected to an MP3 player and controlled by the MP3 player. The IPODUSB interface is used to connect IPOD or USB or U disk. After connection, the playback can be controlled through the car audio system. When connecting AUX or IPOD to a USB flash drive, you can use the CDAUX key on the car player to perform conversion operations and playback, but they are all external devices, and the audio and video from the external device cannot be transferred to the car player for storage and playback. The AUX interface is used to play the built-in audio. One end of the 3.5mm cable (both sides are plugs used on headphones) is plugged into the Aux interface, and the other end is connected to the headphone jack of MP3 or mobile phone. It can be played in the car. By selecting AUX on the panel, you can use the car audio system to play music or incoming phone calls.

The so-called car-mounted, of course, refers to products specifically used in cars, which are convenient for use in motor sports. The most common ones are car-mounted MP3, MP4, GPS, car DVD, car hard drive, and car power supply. Car refrigerator, car massager, car computer, car TV, car U disk video recorder, etc.

The use of famous car brands: Casper, Hikvision, Dahua, and Maxuo generally requires power supply through the car cigarette lighter. Car products have penetrated into people's daily lives and have also It makes everyone’s life easier.

Cars have been used as people's daily means of transportation for more than 120 years. During this period, with the development of science and technology, cars have also experienced rapid changes. These indispensable partners in our daily life have evolved to the point where they can fly at speeds of more than 200km/h on the highway. The vehicle air-conditioning ensures that the interior of the vehicle is warm in winter and cool in summer. It can also ensure a certain level of comfort when carrying 5 passengers. In short, there are various advantages. Cars have significantly improved human life.