Detailed parameter: The input voltage of the vehicle voltmeter is 12 V to 24 V with a measuring range of 5 V to 32 V and an accuracy of 0.1 V.Twist-and-lock system display: The waterproof voltmeter measuring device is easy to read with a 3-bit LED digital display. It displays the real time of battery voltage monitoring and makes it portable so that you can know the status of the battery and help you in time grasp the condition of the battery voltage between fully and discharged this DC voltmeterWide Applications: The waterproof voltage meter with clamps is suitable for most of vehicles such as motorcycle, boat, ATV, UTV, RV, RV, SUV, SUV, caravan, ship, truck, truck, etc.Convenient to Install: Simply mount the gauge in a 1 1/8 inch hole in the 0.25 inch thick panels with a nylon retaining nut. There are screws and insulated clamps . Simply use a screwdriver (not included) to install, which is easy to useColour:BlackMaterial:plasticPackage Contents:2 x LED digital voltmeter with mounting plate4 x insulated clamps4 x screwsOnly the above package content, other products are not included.Note: Light 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.