85mm GPS Speedometer 0‑17MPH 15 Knots IP67 Red Backlight LCD Display for 12/24V Cars Boats Yachts RVs Item Type: Speedometer Material: Stainless Steel 316L Bezel + Anti-Fog Glass + PVC Backlight: Red COG: Moving Direction Operating Mode: LCD Display (Needle Shows Current Speed), Stepper Motor Fitment: Fit for 12V/24V cars, boats, yachts, RVs and other vehicles. Fixing Dimension: Approx. 85mm/3.3in Indicator Range: 0-15 Knots, 0-17MPH Operating Temperature:-30℃ to +75℃ Storage Temperature:-40℃ to +85℃ Protection Class: IP67,can work underwater approx. 1m/3.3ft Applicable models: suitable for 12V/24V vehicles, boats, yachts, RVs and other vehicles Installation: 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 e: Fix the meter on the dashboard and connect the power cord. Wiring Instruction: The red wire to the positive The blue wire to the negative The orange wire to backlight