Features:
One-touch air flow and velocity with available probe*
Wet bulb and dew point temperature 
% of outside air calculation
CO2 and CO field calibration feature 
Self-test function at startup
Auto-backlight
Automatically compensates for barometric pressure changes
Min/Max/Average on all measured and calculated readings
Multi-language user interface
Metric or standard units
Audible and visual threshold alarms
Extensive discrete or continuous data logging capacity, downloadable to PC via USB interface
Keypad lock for security
Included FlukeView Forms® software
*Included with Fluke 975V, optional with Fluke 975