Feature 1、Wide Application: The speedometer is suitable for a full range of stepping instruments, and can be used for automobiles, engines, ships, RVs, yachts, construction machinery, etc. 2、Characteristic: Speedometer has the advantages of low power consumption, long life and high accuracy. Ultra wide working voltage design, long term working voltage 9‑32V, up to 36V. 3、IP67 Protection: With IP67 high waterproof and dustproof grade, curved glass, anti fog, not afraid of bad weather, not easy to damage. 4、Premium Material: The GPS odometer is made of stainless steel and ABS. It can be used in acid, alkali and humid environments. It is durable and has a long service life. 5、Simple Installation: Easy to install, the package includes user manual, and clearly describes the installation, wiring and use functions. Item Type: GPS Speedometer Material: Stainless Steel + ABS Dial Color: Black, White Dial Backlight Color: Red Signal: GPS Range: 0-140MPH; 0-220km/h (dial double scale, inner ring km/h, outer ring MPH) Working Voltage: 9-32V DC Installation Hole Diameter: 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: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, etc. Package List 1 x Speed Gauge1 x Manual 1 x GPS Receiver