Feature:1. Weatherproof: IP67 waterproof and dustproof grade, with curved glass, antifog, no need to worry about the damage bad weather may cause.2. High Accuracy: With ultrawide working voltage design, longterm operating voltage is 9 to 32V,maximum can up to 36V. Low power consumption and high accuracy.3. Long Durability: Made of 316 stainless steel, PVC and ABS, it can be used for a long time even in acid, alkali and humid environments.4. Wide Application: Suitable for a full range of stepping instruments, can be used for engine/generator sets, ships, construction machinery, agricultural machinery, car modification, etc.5. Easy Installation: Each of our gauge will be shipped with a detailed product manual. The manual will clearly describe the installation, wiring and use functions of the product.Specification:Item Type: TachometerMaterial: ABS+PVC+Stainless SteelBackight Color: Red, Green, Blue, White, Yellow, Cyan, Purple (adjustable)Signal: Speed PulseRange: 0-3000 RPMWorking Voltage: 9-32V DCInstallation Diameter: Approx. 85mm/ 3.35in, and ensure that there is at least 55mm/ 2.17in space behind the dashboardWorking Temperature: -30-+75Storage Temperature: -40-+80Applicable Scenarios: Suitable for automobiles, engines, boats, RVs, yachts, engineering machinery, etc..Package List:1 x Tachometer1 x Manual1 x Screw Cap