BTMETER BT-856A Pro HVAC Anemometer Handheld CFM Meter Wind Speed Meter with Backlight Max/Avg/Min Functions for Measuring Wind Speed Air Velocity

 PRODUCT DESCRIPTION ✅Come with a USB and Disc, Which you can stored and analyze data by connecting to the PC via USB. Large Display with Backlight, Low power indicator, Data Hold,℃/℉ Switch, Stretchable and adjustable blades, A greatest weather monitor for windsurfing, sailing, flying and shooting. ✅Wind flow range：CFM 0-999900 ft3/min, Resolution : 001-100, Wind flow area 0.001-9999 ft2,Wind Flow Calculate Formula: Flow =velocity *(Free Area);A good and portable CFM meter for you to measure HVAC,Air Blower and Air Velocity. ✅Air Flow Area Setting：You can press the ''AREA" key,then press the numbers keys to enter a new duct area,such as the number 1 or 2,Then press the "ENTER" key to confirm,You can also press the "UNIT'' key to choose CFM or CMM. ✅Wind Speed Range：0.001~100 mph (Accuracy: +/- 3%+0.2 rdg),0.001~45m/s (Accuracy: +/- 3%+0.1 rdg); Temp Range：32~113℉；Resolution： 0.001mph.  Measure wind speed in MAX/MIN/Current.Display in 5 units: m/s, km/h, ft/min, knots, mph.   FEATURES