iztor Digital Hour Meter Tachometer Tach Tacho Yamaha Honda Kawasaki BMW Applications for all 2-Stroke or 4-Stroke gas powered engines It will show both engine RPM and hours of operation,Read up to 99,999 RPM Easy to install, instructions & user manual included,Programmable maintenance interval setting Internal battery rated for 35,000 hour of operation Can reset total hours and maintenance time,Wrap first wire around your spark plug cable, connect second wire anywhere on the engine or frame