Features: 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 and USB real time data uploading functions. Specifications: m/s(meter per second): 0.80~30.0 (2.0% reading+50) ft/m(feet per minute): 79~5900 (2.0% reading+50) km/h (kilometer per hour): 1.4~108.0 (2.0% reading+50) mile/h(mile per hour): 0.9~67.0 (2.0% reading+50) Knots(nautical miles per hour): 0.8~58.0 (2.0% reading+50) CFM: 0 to 999900 to 9.999ft2 CMM: 0 to 999900 to 9.999ft2 CMS: 0 to 9999 0 - 9.999 m2 Flow Area Setting: MAX/MIN Function: Display Back light: Auto Power Off: Low Batteryindication: Power supply|: 9V6F22 Battery(Not Included) Size: 168 x 85 x 40mm / 6.61 x 3.34 x 1.57 in. Package includes: 1 * HYELEC MS6252A Multifunction Digital Anemometer 1 * Portable Bag 1 * English Instructions (Battery are Not included)