Easy to Use: This small engine tachometer is equipped with a clip, just use the provided clip to clip the spark wire.Tachometer for small engines body-inductive design, the cable can be operated by the bundle of spark plugs. Reset Function at Zero Hour: This upgraded rpm gauge tachometer with a reset function, which can reset total hours and maintenance time.The hour meter reads up to 10,000 hours, hour meter then returns to zero, the rpm meter can read up to 99,999 RPM,tachometer for small engines. Tachometer Hour Meter: The inductive tachometer is suitable for any two-stroke or four-stroke gasoline engine and is suitable for cart engines with a speed range above 30,000 rpm.Measuring speed range (RPM): 100RPM to 30000RPM. Energy saving: When the gasoline engine is not working, the tachometer will automatically save energy and power, and the display will be automatically turned off; When the gasoline engine is in operation, the tachometer automatically starts the test. Wide Applications: This tachometer for small engines is waterproof and powerful.Built-in battery in lasting power, low voltage design, safe and reliable.Extensive use of various chain saw, cropper, generator, lawn mower, RV ATV, dirt, bike, motocross, boat, tractor, and small gasoline engines. Colour:As Shown Material:ABS Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 2 x Digital Chainsaw Tachometer kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.