MULTI-FUNCTION HOUR METER----Contains tachometer, hour meter, service timers(SVC&SVC2), job timer(JOB&JOB2);Help you manage your health engine.Convenient hour meter、service timer and tachometer data viewing on the screen | HOUR METER----Help you track how many hours you put on your engine.Whether the engine is turned off or on,display shows total run time of engine and remains visible.TOT hours are non-resettable; 0.1 hours accuracy; Allows user to preset total hours and replace a failed meter without loss of total elapsed time. | MAINTENANCE REMINDER----Programmable maintenance interval service timer(SVC&SVC2),Countdown tracking service reminder time;JOB timer(JOB&JOB2) used to measure the time of a particular work job, Like change oil, Air filter Replacement etc...; SVC data can be viewed directly on the screen | TACHOMETER----Accurately records your RPMs when the engine is running , Help adjust engine idle;Can be programmed for different engine firing patterns.Programmable RPM Alert , Red backlight display and warning icon flashes;Recording and recall engine MAX RPM; Programmable RPM measurement range selection mode for improved RPM data accuracy | OTHER ----Easy to install; Contains detailed instructions for use; Multi-Color Backlit Display , Battery replaceable, User shutdown; Data retained after shutdown;Waterproof rating: IP67;CE ROHS certification;2-year warranty