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, wire can be bound to the spark plug to operate 3. Set the speed mode at , 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 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.