Features: Double voltmeter design, 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, clearly shows you the current readings of working voltage, helps you to better monitor your car battery condition. Large input voltage of DC 10-60V, built-in over-current, over-voltage and short circuit protection, well protects the whole circuit well. Eco-friendly flame retardant durable ABS plastic and full-sealed black matte surface cover, dust-proof, waterproof and wear resistant. Molded in fashionable rocker switch-style with black matte surface treatment to fit for most original panel socket, easy mounted to dashboard switch location. Fit for most 12-24V Car Motorcycle ATV UTV RV Vehicles Marine Boat and so on. Specification: Material: ABS Plastic Color: Black LED Color: Blue Input Voltage: 10-60V Surface Size: 48.5 * 24mm/1.9 * 0.94in Installation Size: 37 * 21mm/1.46 * 0.83in Package Weight: approx.22g Fitment: Fit for 12V-24V Car Motorcycle Boat Marine ATV RV Vehicles, etc Package List: 1 * LED Digital Dual Voltmeter