Service on time, every time! Every 5 hours of operation CLEAN AIR FILTER will flash. Every 10 hours of running CHANGE OIL will flash, at 20 hours of operation the meter will flash VALVE SERVICE. All functions count down showing you balance of time before scheduled service. Functions are re-settable with button. This meter is perfect for the 4-Stroke motorcycle, YZF, CRF, RMZ, KXF...etc. This also meter includes a MOTO TIMER mode to track running sessions. It can be erased with reset button. Meter includes total hours accumulated mode that is non-erasable.