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 Tachometer 1 x User Manual