Digital Hour Meter Tachometer Tach Tacho for Yamaha KTM Honda Kawasaki BMW Motorcycle Dirt Bike ATV UTV Quad Generator MX Snowmobile Boat Outboard Jet Ski 4 2 Stroke Gas Engine

It is a self powered LCD hour meter, tachometer and maintenance meter.
An internal lithium battery furnishes the power for the monitor.
A wire around the spark plug wire of the engine provides both a tachometer signal an indicator that the engine is running.
The maintenance meter is used to alert maintenance personnel that a time interval has expired and maintenance shuold be performed on the engine.