This hot wire anemometer measures air velocity, air temperature and has a built-in contact thermometer. It has 40 to 4,921 feet per minute velocity. It features an automatic temperature compensation, data hold, and an easy-to-read backlit LCD display. Using an SD card (maximum 16GB), a user can manually record up to 99 readings or automatically by selecting a desired sampling rate from 1 to 3600 seconds.