Switch Control:The voltage gauge waterproof a more accurate battery voltage. You can toggle between voltage and battery percentage or turn it off to reduce battery drain while in storage. Widely Use: Fit for 12-24V Cars, Motorcycles, RV, SUV, Off-road, ATV, Boat, Marine, Ship, Truck, Tractor etc.Mini size and easy to install. Voltage Gauge: Support 5-48V Input Voltage. Power display range 0- . Precise 3-bit LED digital display. Check States: Battery Capacity Voltage Monitor Gauge Indicator better helps you to early notice your car voltage condition. Colour: black Material: plastic Package Contents: 4 x voltmeters 8 x insulated terminals 8 x screws 8 x wires Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.