Feature: 1. Waterproof and Antifog: Built with 316L stainless steel bezel and fogproof glass, with IP67 waterproof and dustproof, our speed gauge is suitable for marine and harsh environments, equipped with anti fog, high transparency, and dual layer fogproof structure. 2. 7 Color Backlight and LED Display: Our speed gauge provides an easy to read seven color backlight for nighttime navigation, while digital display has high precision, repeatability, strong versatility, reliability and stability, easy to use. 3. Dual Display Design: Combining digital and pointer display for efficient data reading, eliminating the need to switch between different gauges, making reading more convenient. 4. Wide Working Voltage Design: Speedometer operates on 9‑32v long term, up to 36v, with low power consumption, long lifespan, high accuracy, and fast start up, perfect for marine vessels and watercrafts. 5. Secure Connection: Featuring a snap on wiring design for a sturdy connection, ensuring the gauge can operate even under strong vibrations, suitable for various transportation vehicles like boats, yachts, and outboard motors. Specification: Item Type: 85mm Boat Speedometer Material: Stainless Steel 316L Bezel + Anti fog Glass Protection Level: IP67, fully waterproof; excellent anti fog function; Backlight Color: Red (default) - green - blue - white - yellow - yellow green - orange - purple (color can be switched) Display: Digital + Pointer Operating Voltage: 9-32VDC Operating Current: ≤100mA Operating Temperature: -30℃ to +70℃ Storage Temperature: -40℃ to +85℃ Protection Level: IP67, can work underwater in the 1m position Sensor Wiring Length: 3.9m / 12.8ft Fitment: Fit for Boat Yacht RV Truck Motorcycle Wiring: 1. Red wire -- +9-32VDC 2. NC (not connected) 3. Orange wire -- Backlight (+) 4. Blue wire -- Power supply negative (-) . Package List: 1 x Speedometer 1 x Wiring 1 x Wiring with Sensor 1 x Mounting Base Clip 2 x Nuts 1 x Manual Note: After drilling holes, make sure to leave at least 70mm of space behind!