About this item Designed to free up your cigarette lighter socket and supply continuous power to your dash camera via OBD connection, enabling your dashcam to keep functioning after you have parked the car. Dual working mode switch button integrated for your convenience: 1. ACC working mode, 5 minutes off when your car ACC is off; 2. Surveillance working mode, keeps working until it detects low battery voltage (11.6V). Obtains power from the OBD interface only, with no interference in other OBD data communication. This cable can be used with dash cams that have a MICRO USB PORT ONLY; please check your dash cam's interface carefully before purchasing! Cable length: 3.5 meters (11.5 ft), Input: 8V-36V Output: 5V/2.1A. Dimension: 1.57 x 4.72 x 2.36 inches.