Product advantages: 1. Low-voltage design, built-in battery, safe and reliable, with a service life of up to five years 2. Body induction design, the link wire can be bound to the spark plug to operate 3. Set the speed mode at will, remind the maintenance function, and reset the system with one key 4. Applicable models: ordinary cars, miniature cars, off-road vehicles, ordinary racing cars, miniature racing cars, off-road racing cars one: 1. The tachometer is applied to all gasoline engines, with spark plugs 2. Inductive design, you only need to bind the connecting wire a few times on the spark plug to work 3. Timing range: within 9999.9 hours; speed range: within 15300RPM 4. LCD liquid crystal display 5. DC low voltage power supply, built-in battery CR2450, DC3.0V 6. The speed mode can be set, which can be applied to 2-stroke or 4-stroke gasoline engines 7. The tachometer line is about 1.65 meters long, equipped with two cable ties, and the English manual two: 1. The timer is applied to all gasoline engines with spark plugs 2. Inductive design, you only need to bind the connecting wire a few times on the spark plug to work 3. The timing range is: less than 9999.9 hours; 4. LCD liquid crystal display 5. DC low voltage power supply, built-in battery CR2430, DC3.0V 6. The timer line is about 1 meter long, English card, blister packaging Product Name: Motorcycle speed timer accumulator Maximum timing range: 9999.9 hours Large speed range: 9999RPM Display screen: LCD liquid crystal display Material: plastic colour: black Package Contents: 1 x Tachometer