Liquid Level Meter Boat Water Level Gauge Pointer Type for RVs for Marines Feature:1. Wide Applications: Suitable for a full range of stepping instruments, and can be used for engine generator sets, ships, construction machinery, agricultural machinery, car modification, etc.2. IP67 Protection: IP67 waterproof and dustproof grade, with curved glass, antifog, no need to worry about possible damage caused by bad weather.3. Advantages: Low power consumption, long lifespan and high accuracy. Ultra wide working voltage design, long term working voltage 932V, maximum can up to 36V.4. Installation: The installation diameter of the gauge is 52mm/2.05in. Make sure there is at least 55mm/2.17in behind the dashboard.5. Quality Materials: Adopting 316 stainless steel, PVC and ABS, can be used even in acid, alkali and humid environments.Specification:Item Type:Water Level GaugeMaterial: PVC+ABS+316 Stainless SteelLight Color: 7 Colors Backlight (Adjustable)Installation Diameter: 52mm/2.05in, and Ensure that There is at Least 55mm/2.17in Space Behind the DashboardWorking Voltage: 9-32VWorking Current: 18mASignal: 0-190Working Temperature: -30-+75Storage Temperature: -40-+80Applicable Scenarios: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, etc.Package List:1 xWater Level Gauge1 xCap1 x Manual How to use: BlacklinenegativeRedlinepositiveBluelinesignallineYellowlinebacklightlineWhitelineadjuststhebacklight