Digital Anemometer Lutron AM-4221 comes with three horizontally aligned spherical cups mounted on a vertical axis in a star-shaped configuration with low-friction bearings. It measures wind speed and direction accurately. This Digital airflow meter features an LCD display and offers fast, reliable readings with digital clarity. The device includes a separate remote sensor for convenience. Compact and portable, this Portable anemometer Lutron is ideal for checking air conditioning and heating systems in residential and industrial settings. Applications: Measures Air Velocity, Temperature, Wind Speed, and Heating Systems.