Mainly the USB port of the car host provides sufficient power for external devices (including USBA & USBC ports), designed to supply power for larger portable electronic products such as laptops, which can increase the power supply of the original USB standard, and USB PD charging The USB port power supply terminal and the electric device communicate and shake hands through a certain protocol to determine the charging power, which is conducive to charging the device quickly. The product supports PD3.0/QC4.0 and QC4.0+QCC/PPS fast Charging protocol, Apple 2.1A/MTK PE/PE+/Huawei FCP/Samsung BC1.2, etc., USB PD standard (USB power supply) allows fast charging via USB connection.