E-Bro DC 12V Digital Voltmeter Chargers WaterProof Marine Car Boat Outlet Socket Boat Car Auto Motorcycle Trucks for Motorcycle Car Boat Blue Light Display: 3-bits ,LED digital tube ,lamp display is blue Suit for: Motorbike Car / Boat / ATV / UTV / Camper / Caravans / Travel Trailer etc Mounts in a 1-1/8" hole in panels up " thick, a nylon retaining nut holds the meter in place. The meter draws nominally 10 mA. and the range is 0-35 vdc.