<p>The battery is easy to replace. change: the inductive tachometer is safe and reliable. The battery is easy to replace. change and can be used for a long time.<br />Double button with clip: reset; zero by pressing the RST button The MODE button can be used to set the speed mode. Gauges with large LCD display, built-in battery, safe and reliable.<br />With system data reset function: automatic reset function at any time. zero hour, reading of the hour meter up to 10,000 hours, then return to zero, the tachometer can display up to 99,999 rpm.<br />Inductive design: at; proximity From the engine spark plug wire, you can measure the speed, switch to sleep mode when not in use. and wake you up to work if necessary.<br />Wide range of applications: suitable for most people. any engine with 2-stroke or 4-stroke gasoline, suitable for trolley engines in the speed range above 25,000 rpm. Measuring revolution range (RPM): 100RPM to 100RPM 30000RPM.<br />Measuring methods:<br />1. Place the handheld meter 3 to 5 cm from the spark plug wire, then test.<br />2. After installing one end Install the electronic wire into the hole of the electronic clock body, use a metal clip to secure it to the clock body. the spark plug wire sheath for induction measurement.<br /><br /><br />Product Features:<br />1. New high quality instruments and large LCD instruments<br />2. Suitable for car engines in the speed range above 25,000 rpm<br /><br /><br />Specification:<br />Material: ABS<br />Size: 46*57（mm）<br /><br /> Black color<br />Features: Digital engine tachometer<br /><br /><br />Package including<br />1 * digital tachometer</p>