Specfications: 1. Input Voltage: 5-60V 2. Display: Red led digital display 3. Product Material: durable ABS 4. Surface Size: 48.5x24mm / 1.9"x0.94" 5. Size of Drill: 37.2x21.2mm / 1.46"x0.83" 6. Fit: 12V-24V Car Motorcycle Boat Marine ATV RV Vehicles, etc Description : 1. 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! 2. Built-in Blue LED Digital Display, Scch and Corrosion , Clearly shows you the current readings of working volts, easily notice your car voltage condition 3. Made of & flame retardant durable ABS plastic and full-sealed black matte surface cover, -tight, Waterproof and Wear 4. one for main battery and the other for auxiliary one. With 2 inner 3-bit digital display, scch-proof and corrosion , designed to check up real time voltage for 5. 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! 6. Reliable ion. Built in over current, over voltage and short circuit ion, it well s the whole circuit. While made of and flame retardant ABS plastic shell and good conductivity connecting pins, it is super sturdy and lasts for a long long time. 7. Surface Mount, Breeze Install.shapeed in fashionable rocker switch-style with black matte surface treatment to fit for most factory panel socket, with drill size of 29mm, this double voltmeter can be easily flush mounted into dashboard switch location, great for most RVs, Campers, Pickups, Vans, Trucks, Trailers, Marine Boats, etc. Package includes: 1 x LED Digital Double Voltmeter PLEASE NOTE: 1. All our products are in stock and ready for immediate dispatch. 2. Pick-up service is not provided. 3. If you