Multi-function Professional AnemometerWind speed, wind temperature, wind chill, low battery indicator are displayed on the bright backlit LCD screen. BT-100 is a portable anemometer that can accurately measure wind speed in 5 units: m/s, km/h, ft/min, knots, mph. Wind temperature unit is / (Celsius/Fahrenheit) Accurate AnemometerAnemometer is used to measure wind speed range 0.67~67.1 mph (+/- 2% of reading), wind temperature -10~60, 14-113 (+/-2, 35.6); resolution 0.1m/s; 0.2. 2 temperature sensors and 8 blades enable this anemometer to sensitively measure extremely low airflows in HVAC installations, duct vents. A good helper for CFM calculations. Air flow in CFM (Q) = wind speed (V) x duct cross-sectional area (A) Tripod mounting holeThe digital anemometer has a metal threaded hole at the bottom, so you can fix it on a tripod for continuous wind speed measurement. It can free your hands when you fly drones, remote control planes, wings, helicopters and quadcopters, and shoot at long distances. Anemometer box includedThis is a lightweight, pocket-sized airspeed meter that is convenient for you and your family to measure during outdoor activities, such as: shooting, boating, kite flying, rock climbing, drone driving, etc. Easy to useManual/auto power off is optional, and the backlit screen allows you to see clearly even in the dark. Comes with 2x1.5V AAA batteries, ready to use when you receive the wind speed tester.