Portable Digital Anemometer: This is a lightweight, pocket-sized, portable wind gauge meter for you and your family to measure outside outdoor activities, such as: Shooting, boat sailing, kite flying, climbing, drone driving, etc. Perfect anemometer for CPU computer fans, air conditioner, air blower Dustproof pipe air velocity, tunnel, etc., to monitor and record wind data, such as: speeds, temperature, air volume, data, time. Wind Flow Calculate formula: Flow = Velocity * (free area) ;A good meter for you to measure, your air blower and an air speed. It is very suitable for outdoor activities, such as climbing, boat sailing, kite flying, cycling, drone driving, RC airplane flying, shooting, etc. You must try this, which can accurately measure wind speed.< /p>