Digital tachometer, maintenance reminder, replaceable battery, automatic shut-off, suitable for lawnmowers, ZTR tractors, generators, marine ATVs, snowmobiles, and other equipment

Hour Meter: Includes tachometer, hour meter, and service counters; 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. SERVICE REMINDER: Programmable service timer (SERVICE), countdown service reminder time; when the service time arrives, the service warning icon flashes as a reminder. TACHOMETER: Accurately records your RPM while the engine is running, helps set the engine idle speed; can be programmed for different engine start modes. REPLACEABLE BATTERY: Replaceable internal CR2450 battery; data is retained after battery replacement; when the engine is stopped, the unit automatically shuts off after 2 minutes. Press the button to read the screen; data retained. After shutdown Note: All data is measured manually, please allow 1-3cm error due to differences in light and display. There may be color differences; please refer to the actual item received.