OBD II power adapter Automatically detect voltage and provide protection. When the voltage you set is reached, the OBD constant power cable will automatically cut off the power supply to prevent excessive discharge of the car battery and ensure that the vehicle can start normally | OBD power cable has a 5V voltage output, maximum output current of 3A, stable current, widely compatible with most dash cams and GPS devices mobile phones,etc.Only obtain power from the OBD interface, without interfering with other OBD data communication | Equipped with dual USB-A ports, it can simultaneously power two USB devices. Provide greater flexibility and practicality for your vehicle | 24-hour parking monitoring mode,The OBD constant power cable is connected to the OBD connector and can ensure continuous power supply for 24 hours. It can stay on even when the car is turned off [Note] dash cams with time-lapse photography function need to turn on . | OBD constant power cable is easy to install and hide, equipped with standard OBD interface, plug and play, releases cigarette lighter to connect more devices