Item Type: Anemometer_x000D_ Material: ABS_x000D_ Wind Speed Measurement Range:_x000D_ 0.0-45.0m/s_x000D_ 0.0-8850Ft/min_x000D_ 0.0-87.5Knots_x000D_ 0.0-160.0Km/h_x000D_ 0.0-100Mph_x000D_ Wind Volume Measurement Range:_x000D_ CFM: 0-999900 Ft3/min_x000D_ CMM: 0-999900m3/min_x000D_ Wind Temperature Measurement Range:_x000D_ 0-45_x000D_ 32-113_x000D_ Humidity Measurement Range: 10-90%RH_x000D_ Power Supply: 4 x 1.5V AAA Alkaline Battery (Battery Not Included)_x000D_ _x000D_ How to Use:_x000D_ 1: The wind speed probe handle is connected to the host._x000D_ 2: Install 4 x 1.5V AAA dry battery (this product does not include)_x000D_ 3: Press the power on, short press the power button for 2s to backlight, UNIT unit switching, AREA/SAMPLE recording time interval, VEL/FLOW wind speed and air volume switching, READ reading and storing recording interface, REC keeping data once, DEL deleting data interface, Maximum/Minimum values, ENTER confirmation button 2/3V Maximum, HOLD data retention