Product information: ~ Input Voltage: 10~32V ~ Display: blue led digital display ~ Product Material: durable ABS ~ Surface Size: 48.5×24mm / 1.9”“x0.94”“ ~ Size of Drill: 37.2×21.2mm / 1.46”“x0.83”“ ~ Fit: 12V~24V Car Motorcycle Boat Marine ATV RV Vehicles, etc Contents in Box: ~ 1 x LED Digital Double Voltmeter More information about product: ~ Switch~style Double Voltmeter, real time monitoring 2 battery packs of vehicles, remind you of charge or replacement in time, better avoid emergent dead battery at starting car engine! ~ Built~in Blue LED Digital Display, Scratch and Corrosion Resistant, Clearly shows you the current readings of working volts, easily notice your car voltage condition ~ Super large input of up to DC 32V with Over~current Over~volt and Short Circuit Protection, well protects the whole circuit, fits for most 12~24V Car Motorcycle ATV UTV RV Vehicles and Marine Boat ~ Made of Eco~friendly & flame retardant durable ABS plastic and full~sealed black matte surface cover, Dust~tight, Waterproof and Wear Resistant ~ Panel Flush Mount and Easy to Install, with drill size of 1.46”“x0.83”“, universal fits to most factory reserved dashboard switch locations ~ Upgraded Version of LED Digital Double Voltmeter is the Bright Choice, for Safe and Fun! Input large volts of DC 10~32V, it is suitable for most 12~24V vehicles with 2 battery pack, one for main battery and the other for auxiliary one. With 2 inner 3~bit digital display, scratch~proof and corrosion resistant, designed to check up real time voltage for 2 electrical appliances, which clearly shows you the voltage readings and helps you to better monitor your car battery condition. Say Goodbye to Exhausted Battery Before Each Drive! ~ Reliable Safety Protection ~ Built in over current, over voltage and short circuit protection, it well protects the whole circuit. While made of eco~friendly and flame retardant ABS plastic shell and good conductivity connecting pins, it is super sturdy and lasts for a long long time. ~ Surface Mount, Breeze Install ~ Molded in fashionable rocker switch~style with black matte surface treatment to fit for most original factory panel socket, with drill size of 1.46”“x0.83”“, this double voltmeter can be easily flush mounted into dashboard switch location, great for most RVs, Campers, Pickups, Vans, Trucks, Trailers, Marine Boats, etc. Get One for Your Vehicle, Well Know of Car!