Description: This is a professional and practical tachometer with wide measuring type and range. It is dual use, you can choose non-contact or contact way to test on your needs. With laser technology to targeting, you can get more accurate data. It can be widely used in the field of motor, electrical fan, paper making, plastic industry, chemical fiber, washing machines, car making etc. Features: Dual use for non-contact & contact testing on your needs. Have 4 different connecting head used for contact measuring. Wide measuring type: can test rotational speed(RPM), counter rotating(REV),frequency(Hz),surface speed(m/minute; inch/min; feet/min; yard/min and length(meter, inch, feet, yard). 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 range: non-contact way--2 to 99999RPM; contact way--2 to 20000. Sampling time is just 0.5 sec. Extensive usage: usually can be used in the field of motor, electrical fan, paper making, plastic industry, chemical fiber, washing machines, car making etc. Specifications: Condition:100% Brand New Power Supply: 9V Battery （ Not Included) Display: 5-digit Backlight LCD Display Accuracy: 0.02% +/- 2 digits Contact Measuring Range: 2-19999RPM Non-contact Measuring Range: 2-99999RPM REV Measuring Range: 1-99999 Resolution Ratio: 0.1 or 1 Sampling Time: 0.5sec. Measuring Distance: 50mm-600mm Power Consumption: 45mA Product Size: Approx. 18.5 x 7 x 3cm/7.3 x 2.8 x 1.2in Net Weight: Approx.190g/6.7oz Package List: 1 x Tachometer 4 x Connecting Head 1 x Red Protection Cover 1 x Reflective Tag 1 x Englsih User Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. .