Function: 1. The black dial with white LED display is characterized by high contrast, is legible and does not hurt the eyes. 2. The digital scales on the dial are clearly printed, measuring range 8-18V, convenient to use. 3. Universal 12 V meter, suitable dla most 12 V cars, provides precise measurement results. 4. It adopts high quality plastic housing, anti-vibration and anti-wear, with stable performance. 5. Comes with mounting clamp for easy installation, compact and lightweight, it can be freely installed. Specification: Item Type: Voltmeter Material: plastic Kolor lens: Smoky lens Kolor of needle: red Kolor of the dial: black Size: approx. 52 mm/2 inches Length: about 7,2 cm/2,8 inch Wire length: approx. 52 cm /20.5 inch Measuring range: 8-18V Power supply: DC (10-15 V) 12 V professional Application: Universal do car 12V Installation: 1. The indicator can be mounted in holes with a diameter of 2 inches / 52 mm or in panels mounted on car meters. Secure the za using the provided mounting clamps. 2. Drill 3/8 inch diameter holes and mount rubber grommets in places where a pressure or vacuum line passes through the sheet metal, e.g. fire wall. 3. Attach the nylon pressure hose do connectors on the back of the pressure gauge za using an adapter, sleeve and pressure nut (not included). Guide the cable through the guides do of the engine compartment. Connect the do pressure port cable on the motor using the 1/8 inch adapter sleeve and the do pressure nut measuring pressure gauge or adapter 1/8 inch and the do vacuometer fitting. 4. Start the engine and carefully inspect the installation for leaks. Twist the lamp socket assembly and connect one wire (yellow) do of the dashboard lighting circuit or other 12V power source, and the other wire (black) do good grounding. List of packages: 1 x Voltmeter 1 x Manual