P3 P0270 Mold Alert Electronic Thermo-Hygrometer Electronic thermo-hygrometer with Swiss precision sensor Monitors multiple factors that can lead to mold, dust mites, and bacteria Dew point of 65-percent humidity triggers audio/visual alarm Min/max with reset; degrees F or C; 2 AA batteries required (not included) Measures 2-1/2 by 3-3/4 by 3-3/4 inches