Function: 1. 4in1 Gauge: Multi-function gauge gauge can display oil level, oil pressure, water temperature and voltage, real-time monitoring. 2. Multi-purpose: oil level, oil pressure, water temperature, voltmeter is applicable to the assembly of RV, yachts, fishing boats, ships, motorcycles, cars, etc. 3. Advantages: The multi-functional instrument has the advantages of high precision, fast detection, excellent stability and short start time. 4. Durable Material: The 4-in-1 instrument panel is made of 316L stainless steel frame and anti-fog glass. Waterproof and dustproof, can adapt to different environments. 5. Easy installation: DC 9-32V working voltage, low power consumption and long service life. The installation dimension is 85mm, and installation and removal are simple. Specification: Item type: 4in1 pointer Material: ABS, stainless steel, anti-fog glass Operating voltage: DC 9-32V Installation Size: Approx. 85mm/3.35in Function: Display oil level, oil pressure (BAR/PSi), water temperature (/) and voltage Application: RV, yacht, fishing boat, ship, motorcycle, car modification, etc Package List: 1x4in1 Guage 1 x Manual Open an 85 mm diameter hole in the instrument mounting plate; Make sure that there is at least 55 mm of free space behind the instrument panel.