85mm Waterproof Tachometer 0-3000/0-4000RPM Car Marine Instrument Hour Meter 7 Color Backlight RPM Sensor M16/M18 Diesel Engine Gauge with Digital Hour Device 12V 24V Features: 1. Racing appearance enhances the characteristics of your vehicle 2. Includes installation manual 3. 7-color backlight for customizable display 4. High precision measurement 5. Suitable for cars, trucks, boats, diesel generators, 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: 0-3000RPM, 0-4000RPM, 0-6000RPM Input Signal: Pulse signal from speed sensor, engine, alternator, ignition coil, crankshaft sensor 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 1 x Sensor