Docooler? Inductive Hour Meter for Marine ATV Motorcycle Dirt Ski Waterproof (RED) rand New Inductive Hour Meter for Marine,ATV,Motorcycle,Dirt,Ski Track the Service Life of Your Vehicle-Oil Changes,Valve,Adjustments,Spark Plugs,ect Easy Installation-peel&stick,no wiring necessary,or attach with enclosed hardware. No Battery Required-connecys to spark plug wire. Works on Any Gas Engine. Records and Displays to 9,999.9 Hours.Stand-by Time up to over 20,000 hours. Hour Glass Symbol Appears and Flashes on/off to Indicate Counting Time. Automatic Roll Over Resolution 0.1 Hour. 100% epoxy encapsulated casing resists water,shock,stand fireof 85 Celsius degree.