brand new and high quality This meter is a portable, professional measuring instrument with large-screen LCD and backlight, multi-unit switching functions. This meter can be used for hand-held or fixed measurement. This meter has the functions of reading hold, maximum, minimum, etc. It has a low battery indicator . Specification: Wind velocity:m/s(meter per second): 0.80~30.0 (2.0% reading+50) ft/for m (feet per minute): 78~5900 (2.0% reading+5) for km/h (kilometer per hour): 1.4~108.0 (2.0% reading+50) mile/h(mile per hour): 0.9~67.20 (2.0% reading+5) Knots(nautical miles per hour): 0.8~58.0 (2.0% reading+50) ft/s(feet peer second):1.30~98.50(2.0% reading+50) Air Flow:CFM: 0 to 99990 0 to 9.999ft2 CMM: 0 to 99990 0 to 9.999m2 CMS: 0 to 9999 0 - 9.999 m2 Flow Area Setting MAX/MIN Function Display Back light Auto Power Off Low Battery indication Power supply: 9V6F22 Battery(Not Included) Size: (L*for W*H)17.20*8.80*4.50cm/6.77"*3.46"*1.77" Quantity:1 Set Note: Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1pc * HYELEC MS6252A Multifunction Digital Anemometer 1pc * English Manual 1pc * Canvas bag