TOOGOO(R) Hour Meter For Boat Yama Ski Dirt Quad Dirt bike bicycle Bike Marine ATV Motorcycle Snowmobile Small Stroke Gas Engine Generator digital counter Yellow Brand new and high quality Track the service life of vehicle-oil changs, valve, adjustments, spark plugs, etc. Easy to install , Peel and stick No battery needed - connect to spark plug wire , Works on Any Gas Engine 100% epoxy encapsulated casing resists water, shock, stand fire of 85