12v Voltage Gauge With Contact Switch Digital Display Dc12v 24v Waterproof Voltmeter Panel For Boat High-quality REVERSE CONNECTION: This 12v voltmeter is easy to read, can monitor battery voltage in real time, and has reverse link protection that makes it easy to see battery status. Detect the status of the battery voltage between fully charged and discharged with this DC voltmeter in good time.REAL-TIME VOLTAGE DISPLAY: Digital voltmeter display-accurate 3-digit LED digital display. With the red LED display, the numbers are easy to read and the display is clear at night.SIMPLE AND COMPACT: Mini size and easy to install, very suitable for voltage testing. Waterproof and durable, long service life. Digital car voltmeter with measuring range: 8V - 26V.WIDELY USED: Voltage measurement purposes can also be used for other products. Suitable for 12V 24V , motorcycles, RVs, SUVs, SUVs, ATVs, boats, ships, ships, trucks, tractors, substation automation, distribution automation, test equipment, voltage regulators, etc.Colour: blackMaterial: plastic + metalPackage Contents:1 x Car Voltmeter Gauge2 x Insulated Terminals2 x Screws2 x WiresOnly the above package content, other products are not included.Note: Light reflection 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.