Searon Hour Meter Tach Tachometer for Small Engine Boat Generator Lawn Mower Motorcycle Motocross ATV Snowmobile UTV 2019 Brand New Digital Tach/Maintenance/Hour Meter Small Engine Boat Generator Lawn Mower Motorcycle Motocross ATV Snowmobile UTV Chainsaw Works on these gas engines which firing pattern are 1P1R 2P1R and 1P2R or 2 Stroke 1 Cylinder, 2 Stroke 2 Cylinder, 4 Stroke 1 Cylinder, 4 Stroke 2 Cylinder and 4 Stroke 4 Cylinder Engines. RPM Display From 0 to 20,000 RPM with 10 RPM accuracy. RPM refresh rating: 0.5 Second. Accumulate resettable total running hours from 0 to 999,99 Hours. Programmable JOB Hour meter display from 0 to 9,999.9 hours. Turn On/Off operation and 2 Years Warranty