Feature: 1. Wide Application: It is suitable for a full range of stepping instruments, and can be used for engine generator sets, ships, construction machinery, agricultural machinery, etc. 2. IP67 Protection: IP67 waterproof and dustproof grade, curved glass, antifog, do not worry about damage may be caused by bad weather. 3. Characteristics: It has the characteristics of low power consumption, long life and high precision. Ultra wide working voltage design, long term working voltage 9‑32V, maximum up to 36V. 4. Gauge Installation: Gauge install diameter is 52mm/2.05in, make sure there is at least 55mm/2.17in of space behind the dashboard. 5. Premium Material: Made of 316 stainless steel, PVC and ABS, it can be used for a long time even in acid, alkali and humid environments. Specification: Item Type: Boat Voltmeter Material: PVC+ABS+316 Stainless SteelLight Color: 7 Colors Backlight (Adjustable) Installation Diameter: 52mm/2.05in, and Ensure that There is at Least 55mm/2.17in Space Behind the Dashboard Working Voltage: 9-32V Working Current: 15-21mA Signal: 8-16V Working Temperature: -30℃-+75℃ Storage Temperature: -40℃-+80℃ Applicable Scenarios: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, etc.. Package List: 1 x Boat Voltmeter1 x Cap1 x Manual