Brand new, Battery gauge for your 12v vehicle. 100% water proof. Easy to install, 2 terminals. Connect either one to 12v dc source (+) such as ignition key, headlights, power outlet; other one to the ground (-). Operating Range: 10 to 18 Volts. Display: 10 LEDs, only one lights at a time. Weight: 1 Ounce. Voltage Supply: 12 Volts DC. Temperature Range: -40 to 185 Fahrenheit; -40C to 85C. Construction: Water Proof - Solid State. Dimensions: OD 2.25". Depth Behind front meter flange to end of spade lug connectors - 1 inch. Hole size - 1 15/16 ".