Digital 52MM Tach Hour Meter Tachometer Searon for Gas Engine 2/4 Stroke Motorcycle ATV Boat Snowmobile Marine Lawn Mower Digital Backlit Tachometer Tach Hour Meter for Gas Engine 2/4 Stroke Boat Motorcycle ATV Boat Snowmobile Marine Lawn Mower Accumulating total running hours (TOT), record JOB running time (JOB). JOB hours are resettable. Displays current RPM from 0-20,000 RPM with 10 RPM resolution and record MAX RPM Non-resettable total hours display from 0-99,999. TOT time cannot be reset 2 Years Warranty