Runleader HM032R Inductive Tachometer Digital Tach Hour Meter Backlit Flash Alert Service Alarms for Gasoline Engine Chainsaw ATV UTV Dirtbike Motobike Motocycle Outboards Snowmobile Marine Boat Induction Tachometer for 2 or 4 Stroke Gasoline Engine Records and Displays to 99999 hours/20000 RPM Backlight Hour Meter Timing System:Accumulating total running hours TOT, recording partial running time JOB,maintenance timer can be set freely to 0-200 hours SVC RPM Measuring System:Measuring current engine RPM,recording and viewing engine MAX RPM,and setting overspeed warning function,refresh rate can be set 0.5S or 1S,The tach hour meter shows current RPM's when the engine is running; Reminder Service:User can set this LCD tach hour meter from 0 hours to 200 hours; Replaceable CR2032 battery,data stored automatically after replacing the battery,CE & RoHS Certification,;2 Years warranty.