- Rev mode can be set for 2-stroke or 4-stroke engines, providing accurate RPM readings and appropriate tuning for the engine type. - LCD display powered by a built-in CR2450 battery (DC 3.0V); no external power source required and the display remains easy to read in workshop or field conditions. - Tachometer compatible with all petrol engines that use spark plugs; suitable for a wide range of applications from vehicles to tools and hobby engines. - Inductive mode requires only a few turns of the sensing wire around the plug lead to operate; no direct contact with ignition components is needed for measurement. - Applications - Tune a two-stroke motorcycle or four-stroke scooter by monitoring RPM during carburetor adjustments and shift points. - Inspect garden equipment such as lawn mowers, chainsaws, or small generators to verify safe operating RPM and diagnose irregular readings. - Monitor RPM on petrol RC engines or model airplanes/cars during setup and performance testing for reliable operation.