Looking for a programmable and resettable tachometer and hourmeter for RC toys, lawnmower, garden tractor, riding mower, leaf blower, pressure washer, chainsaw, snowblower, scrubber, brush mower, line trimmer, string trimmer, portable inverter, generator, motorcycle, bicycle, dirtbike, ATV, UTV, scooter, paramotor, Harley dual-sport bike, golf cart, outboard Jet ski, pontoon boat, Mercury race boat, hovercraft, etc...?<br><br>Timorn rpm meter works for most types of gasoline engines, 2 stroke or 4 stroke gas engines, such as outdoor power equipment, generators, agriculture, construction machinery, vehicles, boats, Marine, etc... <br><br><b>Description: </b><br><br> Inductive Hour Meter was powered by the built in changeable battery. <br> Easy to Install the digital memory tachometer.<br> Large LCD display for easy reading. <br> Waterproof Inductive Hour Meter Suitable for all 2 Stroke & 4 Stroke gasoline engines<br> Tachometer and Engine Hour Meter show both engine RPM and hours of operation<br><br> <b>Note: </b><br>1. The connection between chainsaw tachometer and engine is only one wire, please do wrap 4-5 turns of the wire to the engine's spark plug fire.<br>2. Activate Tachometer and inductive hour meter before use:①After installing, press the S1 and S2 button together, the screen will start displaying 00000 99999, 2s later, the screen will turn off.②Press S1 (or S2 button) to activate the meter, then the screen will display '0.0' . <br><br> <b>Package Includes: </b><br> 1* Engine hour meter with 1*CR2450 Lithium Button Cell Battery inside <br> 1* Fixed Wire (1.9m) <br> 1*English User Manual