Technical Specifications: ACC mode Input: 13V-36V | Output: 5V/3A Surveillance mode Input: 11.6V-36V | Output: 5V/3A Extension cable: 3.5meters(11.5 ft) length Interface: TYPE C USB (obd power adapter usb c) One button for Two work modes: Mode “O”: ACC mode: When your car ACC is off, the OBD power cable will also power off after 20 minutes. Mode “—”: Surveillance mode: When you car ACC is off, the OBD power cable will keep working until detecting the car battery voltage is at 11.6V(low voltage), it will power off after 30 seconds The low voltage protection for mode “—” protect your car from running out the battery, enable you have enough voltage to start the car for next driving. Attention: 1.Please note that the car OBD, OBD2 power cable is only working for dash cams which range from 8V-36V,other voltage range is not supported. The voltage will be converted to 5V output. 2.This car charger adapter is suitable for 16pin OBD and OBD2 ports. It is only used for charging.