This rugged meter is pocket sized, so it can always be with you when you need it. Ideal for measuring general airflow or when monitoring more specific HVAC conditions. Professional-grade sensors produce accuracies is uncommon in a meter this size. The menu-driven three button design allows for easy selection of the meters function. Both models feature air velocity, ambient temperature, min/max/hold functions, selectable velocity and temperature units, and a large easy-to-read backlit display. Unique hard shell protective cap snaps on and off the meter. When in use, the cap fully encases the meter, protecting everything including the display screen and sensors.