Features: 1.Induction tachometer for 2?stroke or 4?stroke gasoline engines, recording and displaying 99999 hours / 20000 RPM. 2.Support accumulated running time TOT, record part of running time JOB, and the maintenance timer can be freely set to 0?200 hours SVC. 3.The operation of the Hour meter is connected by5 ft. insulated wire. You need wind the wire around the spark plugs about 5 times. The gauge is activated by the engine's spark. 4.Measuring the current engine speed, record and view the maximum engine speed, and set the overspeed warning function. The refreshed rate can be set to 0.5S or 1S. The tachometer displays the current RPM when the engine is running. 5.With reminder service, users can set this LCD tachometer from 0 hours to 200 hours. Replaceable CR2032 battery, automatically stores data after battery replacement. Specification: Item Type: Tachometer _x000D_ Material: ABS_x000D_ Color: Black_x000D_ Battery: CR2032 button battery, 210mAH (built-in)_x000D_ Waterproof Rate: IP65_x000D_ Induction Wire: Approx. 1.5M/4.9ft_x000D_ Product Size: Approx. 67.1 x 35 x 17.6mm/2.6 x 1.4 x 0.7in_x000D_ Display Screen: LCD+ Green Backlight_x000D_ Screen Size: Approx. 40.9 x 16.9mm/1.6 x 0.7in_x000D_ Induction Wire Type: UL2464 26AWG/2C_x000D_ Refresh Rate: 0.5S/1S_x000D_ Hours Range: 0-99999H_x000D_ RPM Range: 0-20000RPM_x000D_ RPM Alert Setting Range:1000-20000RPM_x000D_ N.W.46.7_x000D_ Length Battery Specification: CR2032 210mAH_x000D_ Timing Accuracy:0.1H_x000D_ Maintinance Timer:0-200H_x000D_ RPM Accuracy:10RPM_x000D_ _x000D_ Function:_x000D_ Timing System Including:_x000D_ Total running hours TOT,total hours are non-resettable_x000D_ Partial running time JOB,partial hours are resettable_x000D_ Maintenance timer can be set freely to 0-200 hours SVC_x000D_ Hours Range 0-99,999.9 hours with 0.1 hours accuracy_x000D_ _x000D_ RPM Measuring System:_x000D_ Measuring current engine RPM_x000D_ recording and recall engine Maximum RPM_x000D_ Setting overspeed warning function and can resettable_x000D_ RPM Range 0- 20,000,RPMs with 10 RPM accuracy._x000D_ Replaceable CR2032 battery._x000D_ _x000D_ Applicative Engine Types:_x000D_ 2 Stroke Gasoline Engine of 1 Cylinder/ 2 Cylinders/ 3 Cylinders_x000D_ 4 Stroke Gasoline Engine of 1 Cylinder/ 2 Cylinders/ 3 Cylinders/ 4 Cylinders/ 5 Cylinders/ 6 Cylinders/ 8 Cylinders/ 12 Cylinders