1、Applications: Suitable for a full range of stepping instruments, and can be applied in engine generator sets, ships, construction machinery, agricultural machinery, car modification, etc. 2、IP67 Protection: IP67 waterproof and dustproof grade, with curved glass, antifog, no worry about the damage bad weather may cause. 3、Advantages: Low power consumption, long life, high precision. Ultra wide working voltage design, long term working voltage 9‑32V, up to 36V. 4、Quality Materials: With the use of 316 stainless steel, PVC and ABS material, can be used even in acid, alkali and humid environments. 5、With Manual: Comes with manual, will clearly describe the installation, wiring and use functions of the product, so there is no need to worry about the situation that it will not be used after purchase. Item Type: RPM Tachometer Material: PVC+ABS+316 Stainless Steel Light Color: 7 Colors Backlight (Adjustable)Signal: Speed Pulse Range: 0‑8000RPM Working Voltage: 9-32V DC Installation Diameter: 85mm/3.35in(white body 85mm without white cover), and Ensure that There is at Least 55mm/2.17in Space Behind the Dashboard Working Temperature: -30℃-+75℃ Storage Temperature: -40℃-+80℃ Applicable Scenarios: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, etc. 1 x RPM Tachometer 1 x Manual 1 x Cap