This is a power supply unit that connects to a vehicle battery for parking recording, with off-timer settings and a vehicle battery voltage monitoring function. I am selling this because it is no longer needed due to a change in my in-vehicle equipment. It was working until recently, so I believe there are no issues. Manufacturer: Yupiteru Product Name: OP-VMU01 Quantity: 1 Compatible with 12V and 24V vehicles With voltage monitoring function External dimensions: Approximately 46mm(W) X 36mm(H) X 16mm(D) We are only accepting bids from those who understand that this is a no-claims, no-returns sale. Shipping is free. Thank you.