Cllena DC 12V LED Digital Display Voltmeter for Car Motorcycle Boat Marine Truck Rv ATV (Green LED) Waterproof for Car Boat Marine Vehicle Motorcycle Truck ATV UTV Input voltage: 12V-24V DC; LED light: Red; EASY to install Measure voltage: 6-30V, great mini voltmeter to monitor your vehicle battery status Size: 1.4'' x 1.4'' x 0.5'' Interface type: Anode and Cathode Meterial: Environmental protection engineering plastic shell