Perfect tool set: It includes a stable non-contact portable digital photo tachometer, a blue protective bag, 3 reflective strips and an English user manual. Measuring Range: Measuring range from 2.5 rpm to 99999 rpm with high resolution of 0.1 rpm or 1 rpm. Auto range: This tachometer can automatically record the maximum value, minimum value and final value, with auto range, low battery indication and other functions. High precision: The digital tachometer has a high sampling frequency, a clear liquid crystal display and high measurement accuracy. Widely used: It is widely used in motors, wheels, lathes, electric fans, paper, plastics, washing machines, automobile manufacturing and other fields.