Item Type: TachometerMaterial: ABS+PVC+Stainless SteelBackight Color: Red, Green, Blue, White, Yellow, Cyan, Purple (adjustable)Signal: Speed PulseRange: 0-7000 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¡æ-+75¡æStorage Temperature: -40¡æ-+80¡æApplicable Scenarios: Suitable for automobiles, engines, boats, RVs, yachts, engineering machinery, etc.1¡¢Weatherproof: IP67 waterproof and dustproof grade, with curved glass, anti?fog, no need to worry about the damage bad weather may cause. 2¡¢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. 3¡¢High Accuracy: With ultra?wide working voltage design, long?term operating voltage is 9 to 32V,maximum can up to 36V. Low power consumption and high accuracy. 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¡¢Vibration Resistant: Snap together with the harness connector to achieve the secure connection, so that the tachometer gauge can work normally even under strong vibration. 6¡¢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. 1 x Tachometer 1 x Manual 1 x Screw Cap