Features: 1Stable Performance: Safe and reliable professional digital anemometer. Can measure wind speed, air volume, wind, both sides of the anti slip design, easy to use, simple operation. 2Strong Data Collection: Impeller type and bearing sensors, short response time, strong anti interference ability, small wind can also be sensed, strong data collection. 3No Difference Between Day and Night: LCD night vision, backlight technology, no difference between day and night, clear value, visible without fear of sunlight, weak light at night. 4Six Kinds of Wind Speed Unit Measurement: A variety of wind speed unit one key switch, so that the measurement more intelligent and convenient. (m/s, Km/h, ft/s, ft/m, knots, mile/h) 5Air Volume Measurement: Before air volume measurement, enter the cross sectional area of the air duct, CFM, CMM, CMS. 6Wind Rating Measurement: Real time display of wind rating, visual data, you can intuitively see the current wind speed, wind rating: 0~12. Item Type: Handheld Anemometer Weight: 314g/11.4oz Battery (shipped without battery): 3 x AAA battery Product Size: 195 x 70 x 30mm/7.7 x 2.8 x 1.2in Display: LCD display, maximum display 9999 Wind Speed Measurement: range 0.40~30.00m/s Sampling Time: about 0.5 seconds/time Sensor: impeller type and bearing Wind Power Rating: 0~12 Maximum, Minimum, and Average: Record and view the minimum, maximum, and average values. Data Hold: Lock the display reading Operating Environment: 0~50, maximum relative humidity of 80%, altitude < 2000m Storage Environment: -10~50, maximum relative humidity 70% (take out the battery) Automatic Shutdown: 10 minutes (can cancel the automatic shutdown function) Functions: wind speed measurement, air duct cross sectional area setting, data retention, unit selection, automatic shutdown function. Application: Widely used in wind energy, meteorology, industry, agriculture, water conservancy, environmental protection, highway, airport and other fields. Material: Plastic 1 x Anemometer&nbsp 1 x Storage Box&nbsp 1 x Instruction Manual&nbsp