Feature 1GPS Speedometer: 030MPH/H display range, high accuracy, low power consumption, adjustable backlight. Curved glass, good anti fog effect. 2Wide Working Voltage: Ultra wide working voltage design, the long term working voltage is 932V, up to 36V, safe and reliable. 3Application: Suitable for a full range of stepping instruments, which can be used for engines, ships, automobiles, etc. 4High Quality Materials: Made of 316 stainless steel and ABS, IP67 waterproof and dustproof, durable even in acid, alkali and humid environments. 5Easy to Install: Comes with a detailed manual, which clearly describes installation, wiring and functions, convenient for using.Item Type: GPS SpeedometerMaterial: Stainless Steel + ABSLight Color: Colorful (adjustable)Signal: GPSMounting Hole Diameter: Approx. 85mm/3.3in, and ensure that there is at least 55mm/2.2in space behind the dashboardWorking Voltage: 9-32V DCWorking Current: 100mADisplay Range: 0-30MPH/HWorking Temperature: -30-+75Storage Temperature: -40-+80Applicable Scenarios: Suitable for automobiles, engines, boats, RVs, yachts, engineering machinery, etc. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Speedometer1 x GPS Receiver1 x Manual1 x Cover