Wide range input: 11~36V; Output: 5V, 1.5A; With voltage measurement / stabilization / reduction function; After the engine flames out, you can connect this product to car battery to supply power for DVR; This is great for parking monitoring; With low voltage protection: detects voltage automatically, when the 12V battery voltage is lower than 11.6V & the 24V battery voltage is lower than 23.2V, this product would disconnect automatically to prevent the car from ignition failure due to low voltage; Total cable length: 4m.