Faria Beede Instruments 33150 4" White Dress Tachometer Gauge with System Check Indicator - Perfect for Marine, Automotive & Industrial Applications

Tachometers work by counting pulses generated by the ignition system, alternator, tach signal generator or magnetic pickup sender. The tach is hooked up to +12VDC, Ground. By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution.

Includes No Oil Warning

Includes Engine Overheat Warning

Includes Check Engine Warning

Includes Low Oil Warning