Feature: 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. Specification: Item Type: Tachometer Material: ABS+PVC+Stainless Steel Backight Color: Red, Green, Blue, White, Yellow, Cyan, Purple (adjustable) Signal: Speed Pulse Range: 0-7000 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℃-+75℃ Storage Temperature: -40℃-+80℃ Applicable Scenarios: Suitable for automobiles, engines, boats, RVs, yachts, engineering machinery, etc. . Package List: 1 x Tachometer1 x Manual1 x Screw Cap