Outlaw Racing OR3566 Wireless Vibration Hour Meter Waterproof No wires or connections needed sealed waterproof unit. Exclusive Lock Out mode prevents the logging of false engine hours when you're transporting your vehicle. Cumulative hours as well as a resettable job hours function. Self sealed battery comes with 5 year warranty and 7-10yr battery life expectancy. How To Video: https://www.youtube.com/watch?v=QBsj02o7Cz4