Feature 1Adopting stepper motor drive pointer, accurately display engine speed, with high repeatability and versatility, drive and control is relatively simple and so on. 2Can be used for all kinds of vehicle modification, and the engines/generating units, ships, construction machinery, agricultural machinery, automotive modification, etc. 3A snap is designed together with the harness connector to get best and tightly connected, ensure that the gauges could work even in strong viberation. 4Come with curved glass with antifog function. With super wide working voltage design, longterm operating voltage is 932V, maximum up to 36V ( 1 min). 5With instructions of high precision, stepper motors used for full range of stepping gauges, function with less power consumption, longer life and so on. 6316L stainless steel for long service time even in acidbase and humid environment. IP67 waterproof and dustproof grade make the gauge more reliability and stability.Item Type: SpeedometerMaterial: Stainless Steel 316L Bezel + Anti-Fog Glass + PVCBacklight: RedCOG: Moving DirectionOperation Mode: LCD Display (Needle Shows Current Speed), Stepper MotorFitment: Fit for 12V/24V cars, boats, yachts, RVs and other vehicles.Working Voltage: 9-32VFixing Dimension: Approx. 85mm/3.3inIndicator Range: 0-15 Knots, 0-17MPHOperating Temperature:-30 to +75Storage Temperature:-40 to +85Protection Class: IP67,can work underwater approx. 1m/3.3ftApplicable models: suitable for 12V/24V vehicles, boats, yachts, RVs and other vehiclesInstallation:1. Open a hole with a diameter of 85mm on the cabin panel and instrument panel, insert the instrument into the hole, the panel corresponding to the instrument panel is marked with a boss, and make a small notch at this position to ensure that there is a 85mm instrument panel at least on the back of the instrument.2. After installing the instrument into the panel, screw it down with a fixing ring (not included).3. Connect the wires, and the instrument shell is directly connected to the 12/24V power supply.4. Insert the wire harness and fix it firmly on the table.How to Use: Fix the meter on the dashboard and connect the power cord.Wiring Instruction:The red wire to the positiveThe blue wire to the negativeThe orange wire to backlight .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 Speed Sensor1 x Power Harness1 x Instruction Manual