Features: 1. Applied to all gasoline engines with spark plugs 2. Inductive design, only requires binding the connecting wire to the spark plug to operate 3. The timing range is 9999.9 hours; Supports a large speed range of 15300 RPM 4. LCD screen display 5. Low voltage design, built-in battery power supply, safe and reliable; The battery has a service life of more than 3 years 6. Speed mode can be set and applied to 2-stroke or 4-stroke engines 7. The maintenance time reminder function can be set, and the LCD screen will flash to remind when the time is up 8. The system data reset function can clear all recorded data Specification: Product name: Gasoline engine tachometer Color: Black Packaging box size: 73 * 73 * 48mm Weight: 0.15kg Voltage: 3.3 (V) Power: 5 (W) Packing: boxed Package included: 1 x tachometer 1 x instruction manual Notice: Due to the different monitor and light effect, the actual color of the item may be slightly different from the color shown on the pictures Thank you! Please allow 1-2cm measuring deviation due to manual measurement.