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% NewPower Supply: 9V BatteryNot Included)Display: 5-digit Backlight LCD DisplayAccuracy: 0.02% +/- 2 digitsContact Measuring Range: 2-19999RPMNon-contact Measuring Range: 2-99999RPMREV Measuring Range: 1-99999Resolution Ratio: 0.1 or 1Sampling Time: 0.5sec.Measuring Distance: 50mm-600mmPower Consumption: 45mAProduct Size: Approx. 18.5 x 7 x 3cm/7.3 x 2.8 x 1.2inNet Weight: Approx.190g/6.7ozPackage List:1 x Tachometer4 x Connecting Head 1 x Red Protection Cover1 x Reflective Tag1 x Englsih User ManualNote: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..