Feature:1. Professional RPM Tachometer: Compatible with various tacho RPM sensors, displaying engine rotation speed accurately, suitable for cars, trucks, boats, derv generators, gasoline engines, construction machinery, and agricultural machinery, etc.2. Multi Color Backlight Display: Featuring a 7 color backlight, this tachometer ensures easy readability in any lighting condition while adding a stylish and modern touch to your vehicle or machinery.3. Anti Vibration Design: Built with a moving magnet principle, this tachometer offers excellent endurance and anti vibration properties, ensuring accurate readings even in humid or harsh environments.4. Simple Installation: The tachometer need to open an 110 mm (4 3/8 in) hole in the panel and make sure there is a 55 mm space on the back of the panel. Connect the harness connector securely so that the tachometer works properly even under strong vibration.5. Premium Performance: Engineered for superior precision and reliability, this professionally crafted tachometer delivers unmatched accuracy and performance in every application.Specification:Item Type: Boat TachometerVoltage: DC 9-32VRPM: 7000RPMFitment: Suitable for Truck Tractor Trailer Car RV Boat.Package List:1 x Tachometer1 x User Manual