DC 12V Digital Voltmeter WaterProof Chargers Outlet Socket Boat Car Auto Motorcycle Trucks 1.For your Motorbike Car / Boat / ATV / UTV / Camper / Caravans / Travel Trailer etc 2.Suitable for a variety of applications including: Marine cockpits, caravan applications, trucks, 4 3. Display: 3-bits ,LED digital tube ,lamp display is red . 4.Mounts in a 1-1/8 hole in panels up  thick 5. The meter has easy to read LED segments and connect to your 12 volt system.