Product name: digital tachometer. Product Properties: - High-quality measuring instrument with large LCD display. Waterproof and easy installation: - Built-in battery, safe and reliable. - Widely used for off-road, go-karts, off-road vehicles, two-jump chains or scooter engines Material: acrylonitrile-butadiene-styrene (ABS). Dimensions: 4,67 x 5,7 cm. Weight: 60 g.Kolor: black. Digital tachometer battery life: 2 - 3 years. . Wide range of applications, suitable for Cart engines with a rotational speed above 25 000 rpm. double-sided printing (duplex): yes Suitable for any 2-stroke or 4-stroke gasoline engine. . Easy installation, use of induction design, spark plug for work. Widely used in off-road motorcycles, karts, off-road vehicles, two-stroke chainsaws or mower engines. . Automatic reset function at zero hour, read the timer working hours up to 10000 hours, then return to zero, tachometer can display up to 99 999 rpm. double-sided printing (duplex): yes With system data reset function. . Easy to use. When the engine is turned on, the current rotation speed is displayed. When the engine is turned off, all operating hours are displayed. Use the service icon to set up programmable maintenance times to remind you when to replace oil or other services. .