The Triplett CFM100 Anemometer measures Air Velocity up to 5900 ft./minute (30 m/second), Air Flow (Volume) to 9900 CFM/CMM and Air Temperature 122°F/50°C) for use in HVAC System installation and maintenance, cleanrooms, kitchen exhaust systems, wind power monitoring, construction, sailing/boating, vehicle aerodynamics and many other applications. It has side mounted function keys for easy 1-hand operation. Measurements are displayed on a dual backlit easy-to-read LCD display. Minimum/Maximum/Avg recalls highest, lowest and average (2-hour maximum) readings and Data Hold freezes the reading on the display when taking measurements in areas where the display cannot be easily viewed. in addition, a memory location stores a commonly used area size for easy recall (1 each for CFM and CMM). The auto power off (with disable) function conserves battery life.