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/min (feet per minute): 78~5900 (2.0% reading + 5) 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 per second): 1.30~98.50 (2.0% reading + 50) Air Flow: CFM: 0 to 99990, 0 to 9.999 ft CMM: 0 to 99990, 0 to 9.999 m CMS: 0 to 9999, 0 to 9.999 m Flow Area Setting MAX/MIN Function Display Backlight Auto Power Off Low Battery Indication Power supply: 9V 6F22 Battery (Not Included) Size: (L x W x H) 17.20 x 8.80 x 4.50 cm / 6.77 x 3.46 x 1.77 in Quantity: 1 Set Note: Size is measured manually; there may be a 0 to 2 cm error, which is considered normal. Due to differences between monitors, the picture may not reflect the actual color of the item. Package includes: 1 pc * HYELEC MS6252A Multifunction Digital Anemometer 1 pc * English Manual 1 pc * Canvas Bag