●PRODUCT BRIEF: High resolution ratio and 5-digit backlight LCD display, latest laser targeting technology. All 30 data storage: 10 maximum/ minimum/instantaneous measuring data. ●WIDE MEASURING TYPE: can test rotational speed(RPM), counter rotating(),frequency(Hz),surface speed(m/minute; inch/min; feet/min; yard/min and length(meter, inch, feet, yard). ●PRACTICAL TOOL: Dual use for non-contact & contact testing on your needs. Have 4 different connecting head used for contact measuring. ●GREAT PERFORMANCE: non-contact way--2 to 99999RPM; contact way--2 to 20000. Sampling time is just 0.5 sec. ●WIDELY APPLICATION: usually can be used in the field of motor, electrical fan, paper making, plastic industry, chemical fiber, washing machines, car making etc