85mm Waterproof Tachometer 0-3000/0-4000RPM Car Marine Tachometer Instrument Hour Meter 7 Color Backlight RPM Sensor M16/M18 RPM Meter 85MM Diesel Engine Tachometer Sensor RPM Meter RPM Counter 0-3000RPM with Digital Hour Device 7 color backlight optional 12V 24V Features: 1. Racing appearance enhances the characteristics of your car or vehicle 2. Comes with installation manual 3. 7-color backlight 4. High precision 5. Applicable for cars, trucks, boats, diesel generator engines, and gasoline engines 6. Available ranges: 0-3000RPM, 0-4000RPM, 0-6000RPM Specifications: Material: Stainless Steel + Nickel Plated Plastic Working Voltage: 12V/24V Connection: Red (Battery +9-32VDC), Blue (Battery -), Black (Signal), Orange (Backlight +9-32VDC) Indicating Range: 0-4000RPM, 0-3000RPM, 0-6000RPM Input Signal: Pulse signal from speed sensor, engine, alternator, ignition coil, crankshaft sensor, etc. Adjustable Speed Ratio: 1-300 Protection Level: IP67, suitable for operation up to 1 meter underwater Package Includes: 1 x Tachometer 1 x Installation Instructions (sensor not included) 1 x Sensor (gauge not included)