Parameter information: the package includes 4 pieces car voltage meters, the input voltage is 12 to 24V, the measurement range is DC 5 to 32V, and the accuracy is 0.1V, suitable dimensions are available for your daily useClear LED Indicator: with the precise 3-bit LED digital display, this 12V voltmeter meter meter is easy to read. It is a real-time monitor of the battery voltage that allows you to detect the status of the electrical size in time and capture the condition of the battery voltage between fully charged and discharged this DC voltmeterReliable to use: the LED display meter is made of anti-flame retardant materials, which is waterproof and durable, safe and reliable to use, rust and corrosion resistant. with the reverse connection protection function, the wire line is not burned and does not break, which can support you with a long term application serviceEasy to use: the automatic waterproof voltmeter is easy and convenient to use. Simply install the voltmeter in a 1 to 1/8 inch hole in the control panel, which is approx. A nylon retaining nut with a thickness of 0.25 inches keeps the gauge in place, is small and easy to install. This is an intelligent method for voltage testingWIDE RANGE OF APPLICATION: This digital circular voltmeter is characterised by good compatibility, which is practical for motorcycle cars, boats, ATVs, UTVs, RVs, RVs, SUVs, SUVs, SUVs, caravans, ships, trucks, etc. and meets your requirementsBacklight color: greencolour: blackMaterial: anti-flame retardant materialsSize: about 36.5x27x29mmPackage Contents:4 x LED digital vehicle voltmeterOnly the above package content, other products are not included.Note: Light shooting 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.