Description Specifications Brand LUTRON Model# YK-2005AM Dimensions 7 x 2.9 x 1.3 in (1.35 lbs) Temperature range 32F to 175F Power Supply 4 AA batteries Manufacturer Lutron Units ft/min|m/s| km/h|?knots| MPH Air Velocity Range 100-7880 ft/min Basic accuracy 2% of full scale Product Includes Meter| vane sensor and manual. Air Volume Range 0 to 999|900 CFM Product Details Lutron Anemometer Real Time Data Logger YK-2005AM Metal Vane CFM Air Flow Meter, Lutron’s Anemometer Real Time data logger is an easy way to monitor wind speed and direction. The device uses a sensor to measure wind speed and direction every minute or two. It can be used indoors or outdoors. Excellent Performance