【2-in-1 Professional Anemometer】The FOOAO Anemometer professionally measure wind speed and temperature—all displayed on a bright backlit LCD. The anemometer supports 4 wind speed units (mph,knots,m/s, km/h) and dual temperature units (℉/℃).It features MAX&AVG Data HOLD, Backlight, and Auto Power Off indicator, suitable for various professional and recreational scenarios. 【High-Precision Wind Meter】The wind speed meter measures wind speeds from 0.67 to 67mph (±5% accuracy) and wind temperatures from 14 to 113°F( -10 to 45℃). It features a resolution of 0.1 m/s and 0.1℃. 【Professional HVAC CMF Meter】 This wind gauge is equipped with temperature sensor and an 6-vane design, enabling highly sensitive detection of even very low airflow—ideal for HVAC installation and duct vent inspection. A perfect companion for calculating CFM. Air Flow in CFM (Q) = Wind Speed (V) × Duct Cross-Sectional Area (A) 【Widely Used Handheld Anemometer】The backlit LCD screen ensures clear visibility in low-light conditions.The Portable Handheld Anemometer is ideal for outdoor activities.Such as Long Range shooting, Hunting,Sailing,Kite Flying,Drone Driving,CFM Air Flow Test,Golf,Biking,Fan Manufacturing,Wind Power,Offshore Operations,HVAC Systems,Electric Power, Steel,Petrochemical, Aviation,Duct Ventilation System and Underground Warehouse etc. 【What You Get】1×Digital Anemometer,3×1.5V AAA Battery,1×Instruction Manual.Please feel free to contact us anytime.We have always done our utmost to ensure every customer is satisfied. FOOAO Digital Anemometer,Wind Meter Handheld ,CMF Meter to Measure Wind Speed and Temperature to Assist in Drone Flights, Outdoor Activities, Shooting Sports and HVAC Systems