A compact electronic device for measuring temperature and humidity in the laboratory or growroom, with a large, easy-to-read LCD digital display. While not as accurate as larger, more expensive analog or digital thermohygrometers, we recommend the H0122 and use it in our own growrooms. Can be hand-held for spot checking of particular sites or set in a fixed location with the included wall mount. Measures 32 - 122 F (0 - 50 C) and 25 - 95% rH. Temperature accuracy of ± 2° F from 32 - 104° F (±1° C from 0 - 40° C), humidity accuracy of ± 5% rH from 59 - 104° F (15 - 48° C. Includes "Max-Min" controls for recording maximum and minimum levels for both temperature and humidity. Requires 2 AAA batteries (not included).