Runleader RL-HM035R Inductive tachometer with hour meter backlit display for all gasoline engine ATV UTV dirtbike motobike motocycle outboards snowmobile pitbike PWC marine boat waterproof Digital Tachometer Hour Meter for 2 or 4 Stroke Gasoline Engine Backlight Hour meter accumulating total running hours TOT, recording partial running time JOB,maintenance timer can be set freely to 0-200 hours SVC Tachometer Maintenance reminder service,user can set it from 0 hours to 200 hours .RPM refresh can be set 0.5s or 1s measuring current engine RPM,recording and viewing engine MAX RPM,and setting overspeed warning function,refresh rate can be set 0.5S or 1S Battery can be replaceable. Waterproof IP65.CE & RoHS Certification