Inductive Hour Meter Waterproof LCD Display Hourmeter Gauge for Motorcycle ATV Snowmobile Marine Boat Yama Ski Dirt Generator Black Track the Service Life of Your Vehicle-Oil Changes, Valve, Adjustments, Spark Plugs, etc.Works on any gas engine. Hour glass symbol appears and flashes on/off to indicate counting time. [No Battery Required]connects to spark plug wire, safe and reliable.Track the service life of vehicle-oil changs, valve, adjustments, spark plugs, etc. [Simple and convenient Installation]Peel&stick,no wiring necessary,or attach with enclosed hardware.Drilling into your frame with 2.5mm socket, then secure it to the frame coming with two pick-up screws. Compatibility: All motorcycle models (anything with a spark plug really should work). Tools Required: 2.5mm socket to remove shroud, wire cutters.Waterproof material It comes with two screws to attach it, or you used double sided tape and placed it on top of the generator spark plug access hatch. It has an internal non-replaceable battery.