[Perfect Package]: You will get a high quality non-contact tachometer with 3 reflective strips, 1 English manual and a blue cloth bag, which is more convenient to use and carry. [Wide measurement range]: This is a non-contact tachometer, in which the laser tachometer has a test range of 2.5rpm to 99,999rpm (revolutions per minute), ensuring a wider range can be measured. High precision: The LCD digital tachometer can accurately measure the rotational speed value and the rotational speed sampling rate is very high. The digital tachometer can be clearly displayed on the LCD screen for high-precision measurement. High resolution up to (0.1rpm or 1rpm) Auto Memory: The tachometer can automatically memorize the maximum value, minimum value and last measured value through the range, so that you can better save the data. In addition, the non-contact tachometer is small, lightweight and easy to carry. Wide application: The digital tachometer can be widely used in many fields, it can be used in the engine of metal and wood cutting work, and it can also be used in the fields of wheels, lathes, electric fans, papermaking, plastics industry, automobile manufacturing, etc. . Specifications:Color: orange+graybag color: blueTachometer Dimensions: 131 70 29 mmTest Range:2.5 rpm ~ 99,999 rpm (revolutions per minute)Resolution:0.1 rpm (revolutions per minute) (2.5999, 9 rpm)1 rpm (revolutions per minute)Sampling time: 0.8 seconds (above 60 rpm)Effective distance measurement range: 50mm~500mm (laser light source)Range selection: automatic switchingPower supply: single 6F22 9V batteryPower consumption: about 35mA Scope of supply:1 * Digital Tachometer1 blue cloth bag1* English manual3* Reflective tape Recommendation:1. Before measuring with the digital tachometer, stick the reflective tape on the target object.2. Do not point the laser beam directly at the eyes.3. Do not use the non-contact tachometer near explosive gas or other potentially explosive areas.