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