Features： 1、Materials: Constructed from 316 stainless steel, PVC and ABS, even in acid, alkali and humid environments can also be used for a long time. 2、IP67 Waterproof: Equipped with curved glass, anti fog, no need to worry about the damage bad weather may cause, high durability. 3、Wide Usage: Suitable for a full range of stepping instruments, can be used for generator sets, engineering machinery, agricultural machinery, etc. 4、High Performance: Designed for ultra wide working voltage, long term operating voltage is 9 to 32V, maximum can up to 36V, low power consumption and high accuracy. 5、Easy Installation: Come with a detailed product manual clearly describing the installation, wiring and use functions of the superior gauge. Specification： Item Type: GPS Speedometer Material: 316 Stainless Steel + PVC + ABS Backlight Color: Colorful (Adjustable) Signal: GPS Installation Diameter: Approx. 85mm/3.35in, and ensure that there is at least 55mm/2.2in space behind the dashboard. Working Voltage: 9-32V DC Working Current: ≤100mA Indication Range: 0-120MPH/H Working Temperature: -30℃ to +75℃ Storage Temperature: -40℃ to +80℃ Application: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, etc. Package List： 1 x GPS Speedometer  1 x GPS Receiver Box  1 x Manual  1 x Screw Cap