Jayron Jr-Hm026A Digital Hour Meter Tachometer,Maintenance Reminder,Maximum Rpm NInE-ROnG has focused on product development and manufacturing in the fields of hour meter, battery indicator, multi-function meter?service for the garden machinery industry, outdoor power vehicle equipment, transportation vehicles.In addition, we are also committed to creating simple and practical day timers, night light, hygrometers and other products to add fun and security to our life. MULTI-FUNCTION HOUR METER----Contains hour meter,tachometer , service timers, resettable job timer; HOUR METER----Track hours on the engine.When engine is off, display shows total run time of engine and remains visible.TOT hours are non-resettable; 1 minute accuracy; TACHOMETER----Accurately records your RPMs when the engine is running , Help adjust engine idle;programmed for different engine firing patterns; Recording and recall engine MAX RPM; MAINTENANCE REMINDER----Programmable maintenance interval service timer(SVC SVC2 ),Countdown tracking service reminder time;Used to measure the time of a particular work job; Can reset; OTHERS ----Waterproof rating: IP67;2-year warranty.