Usage Tips:Specification Name: Tachometer Product Name: Tachometer Diameter: 2"/85mm Working Current: 100 MA Working Voltage: 9~32VDC Material: Stainless Steel + Nickel Plated Plastic Working Voltage: 12V/24V Connection: Red -Battery (+9-32VDC) Blue -Battery (-) Black -Signal, Orange -Black light (+9-32VDC) Indication range: 0-3000RPM / 0-4000RPM / 0-6000RPM / 0-8000RPM Input signal: from Pulse signals for speed sensors, engines, alternators, ignition coils, crankshaft sensors, etc. Adjustable speed ratio: 1-300 Protection level: IP67, can work at 1m underwater position Features Applicable to various The vehicle modification uses a stepper motor to drive the pointer to accurately display the engine speed, and uses an LCD display to clearly display the hour. It has the characteristics of high indication accuracy, repeatability and versatility, reliability and stability, and relatively simple driving and control. The watch uses a stepper motor to drive the pointer, accurately displays the engine speed, and clearly displays the hour with an LCD display. Instructions Before installation, first open a hole (diameter: 85~87mm) on the panel to ensure there is space (70mm behind the panel) and Place the meter into the hole. Use M4 nut and C-bracket to seal the meter. Package includes: (as shown in the picture) 1 x Tachometer 1 x Cable 1 x User manual or 1 x Tachometer. Table 1 x Cable 1 x User Manual 1 x Tachometer Sensor