Hour Meter Tach Tachometer Hourmeter 2-4 Stroke Gas ATV Dirt Bike Generator UTV OZ-USA Hour Meter for Marine, ATV, Motorcycle and all other 2 stroke or 4 stroke gas engines. It will show both engine rpm and hours of operation It will read up to 99,999 rpm. Very easy to install, just 1 wire; Wrap it around your spark cable and you are ready to go. Programmable maintenance interval setting. Intsruction manual included. No more guessing for the oil change. Easy to replace internal battery rated for 35,000 hour of operation