Suitable for 16pin OBD and OBD2 ports. It is only used for charging. | Input: DC 8V - 40V, USB output: DC 5V 2.5A. | Two Work Modes: One button operation for two work modes. 1, ACC mode, the car obd power cable will power off after 5 minutes when your car ACC is off. 2, Surveillance working mode, keep working until it detects low battery voltage (11.6V). | With low electricity protection parameters, will auto-cut off power if voltage drop below 11.6V | USB cable, can charge all devices. Such as mobile phone, Car DVR, GPS device, etc.