Features 1、LCD Display: This digital motor tachometer adopts an LCD display, which is clear and allows you to clearly see the real time data of RPM, which is very convenient and practical. 2、Multiple Measurement Methods: This chainsaw tachometer features multiple measurement methods by mounting one end of the electronic wire to an electronic meter and measuring inductively with the metal clip on the spark plug wire sheath. 3、Inductive Design: This digital tachometer RPM meter is inductive design, which is very easy to operate without contact, safe and reliable to use, suitable for measuring the speed (RPM) of 2 strokes, accumulating the timing while the engine is working, and some other unique functions designed. 4、Energy And Power Saving: This tach gauge saves energy and power, when the petrol engine is not working, the tachometer automatically saves power and turns off the display automatically, when the petrol engine is working, the tachometer automatically starts to test. 5、Wide Application: This digital tachometer has a wide range of applications for engines, chainsaws, lawnmowers, gliders, motorbikes, automobiles, go karts, construction vehicles, snowmobiles, beach bikes, motorboats, shredders, generators, vibrators and more. Specification Item Type: Digital Tachometer Material: ABS, PCB Size: Approx. 51.7 x 46.5 x 19mm / 2.04 x 1.83 x 0.75in Battery: CR2450 Battery x 1 (Not Included) Rotation Speed: 100-30000RPM Package List 1 x Digital Tachometer 2 x Cable Ties 1 x Manual