Digital tachometer for chainsaw, small inductive tachometer, waterproof engine tachometer, tachometer for motorcycle lawn mower Inductive design: the inductive tachometer is designed to be installed near the engine spark plug cable to ensure accurate measurement of motor speed. It automatically enters sleep mode when not in use to extend battery life and wakes up quickly when needed. Wide range of applications: The inductive tachometer can be used with any 2-stroke or 4-stroke gasoline engine, making it a versatile tool for measuring engine speed. It is suitable for use in wagon engines with a speed range above 25,000 rpm and can measure rotational speeds from 100 rpm to 30,000 rpm. Easy to use: The inductive tachometer displays the current rotation speed when the engine is running and the total operating hours when the engine is off. It also has a programmable maintenance symbol that reminds the user when it is time to change the oil or perform other maintenance work, making it a useful and convenient tool for maintenance of the engine. Easy to change batteryThe battery of the inductive tachometer can be easily replaced and has a long service life, making it a convenient and reliable tool for measuring engine speed. Auto Zero Hour Reset FunctionThe speedometer inductive tachometer can display up to 10,000 hours before being automatically reset to zero, and it can measure up to 99,999 rpm/ min. It also has a system data reset function, making it easy to use and maintain.