This power supply unit connects to a vehicle's battery to record parking, featuring an off-timer setting and vehicle battery voltage monitoring. I am selling it because it is no longer needed due to replacing my in-vehicle device. It was working until recently, so I believe it is in good working order. 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 only accept bids from those who understand and accept no claims and no returns.