Runleader RL-HM005L Inductive Tachometer with Hour Meter for All Gasoline Engine ATV UTV Dirtbike Motobike Motocycle Outboards Snowmobile Pitbike PWC Marine Boat Waterproof Digital Backlit Inductive Tachometer Tach Hour Meter Works on Any 2/4 stroke Gasoline Engine. Accumulating total running hours TOT, recording partial running time JOB , Partial time resettable Measuring current engine RPM,recording MAX RPM. Records and Displays to 99999 hours/20000 RPM; 10 RPM resolution/ 0.1 hours resolution battery:internal battery + external power;Waterproof IP65,Easy Installation - connects to spark plug wire,2 Years Warranty