General description Digital Hour Meter with Tachometer and Maintenance Reminder is designed to help you monitor engine usage effectively. It tracks the total hours spent on your engine, features a programmable maintenance timer, and accurately records RPMs, making it suitable for various applications including ZTR lawn mowers, tractors, generators, marine equipment, ATVs, and snowmobiles. Technical specifications Includes tachometer, hour meter, and service meter Accuracy: 0.1 hour Replaceable internal battery: CR2450 Automatic shut off after 2 minutes of engine stop Usage Tracks engine hours and RPMs Programmable maintenance timer with countdown Flashing maintenance warning icon when service time is reached