Digital hour meter tachometer with maintenance reminder, replaceable battery, automatic shut-off, for use with ZTR lawnmowers, tractors, marine ATVs, snowmobiles, and more.

Hour Meter ---- Contains the tachometer, hour meter, and service meters; helps you track the number of hours you have spent on your engine. The total number of hours can be reset; 0.1 hour accuracy. MAINTENANCE REMINDER ---- Programmable maintenance timer (SERVICE), countdown maintenance reminder time; when maintenance time arrives, the service warning icon flashes as a reminder. TACHOMETER ---- Accurately records your RPM when the engine is running, helps set the engine idle speed; can be programmed for different engine starting modes. REPLACEABLE BATTERY ---- Replaceable internal CR2450 battery, data retained after battery replacement; when the engine is stopped, the reader automatically shuts off after 2 minutes; press the button to read the screen, data retained after shutdown.