Item Type: Tachometer Material: ABS+PVC+Stainless Steel Backight Color: Red, Green, Blue, White, Yellow, Cyan, Purple (adjustable) Signal: Speed Pulse Range: 0-3000 RPM Working Voltage: 9-32V DC Installation Diameter: Approx. 85mm/ 3.35in, and ensure that there is at least 55mm/ 2.17in space behind the dashboard Working Temperature: -30¡æ-+75¡æ Storage Temperature: -40¡æ-+80¡æ Applicable 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¡¢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. 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. 1 x Tachometer 1 x Manual 1 x Screw Cap