White Faria (F33840) Chesapeake Series tachometer with hourmeter gauge. Tachometers function by calculating the number of pulses produced by the ignition system, alternator, tach signal generator, or magnetic pickup sender. The tachometer is connected to +12V DC, Ground, and one of the above signal sources. By choosing the appropriate tachometer and adjusting the back switch to the proper position, you may inform the tachometer of the number of pulses transmitted every engine rotation. These tachometers have an integrated warning light system that illuminates warning indications when the engine detects a defect. Key Features: Scratch-resistant glass lens High-quality engineering Made from high-quality materials Corrosion-resistant and long-lasting plastic cases Without lighting, current consumption is less than 100 mA. White dial with blue and black decorations. Specifically engineered to function in the harsh sea environment Check Engine, Temperature, Oil Level, and RPM Limit. Available in conjunction with SystemCheck. Suzuki Monitor or on-board diagnostics (OBD) systems. Available for use with either gasoline or diesel engines Specifications: Brand: Faria SKU: F33840 Weight: 0.68 LBS Style: Chesapeake White SS Measurement Limit: 7000 RPM Gauge Size: 4" Operating Temperature: -4 degreeF to +158 degreeF Storage Temperature: -22 degreeF to +185 degreeF Operating Voltage: 11.5 to 16 volts Nominal Voltage: 14.2 volts Torque: .57 - .80 Nm Mounting Hole: (85 mm) 3-3/8"