This temperature and humidity meter can be widely used for laboratory, industrial, engineering test and other applications; and exclusively used to measure humidity, air temperature, wet bulb temperature and dew point temperature. Features:Measure temperature & humidity, wet bulb and dew point temperature. Digital humidity and temperature meter used for a high range of applications, such as industry, agriculture, meteorology, health care, daily life, building engineer, in wine cellar, machine room and data storeroom. Maximum / Minimum / Data Hold functions, high accuracy & fast response. LCD display with backlight for easy operation in darkness. Low battery indication, auto power off, energy saving. Specifications:Condition: NewMaterial: ABS PlasticColor: Black + greenRelative Humidity Range 0-99%RH Resolution 0.1% Accuracy 3.0%RH(at 20%-80%), 4.0%RH(at 0%-20%, 80%-99%) Environment Temperature Range -20-60 / -4-140 Resolution 0.1 / 0.2 Accuracy 1.0(0-45), 1.5(-20-0, 45-60); 2.0(32-113), 3.0(-4-32, 113-140) Dew Point Temperature Range -50-60 / -58-140 Resolution 0.1 / 0.2 Accuracy 1.0(0-45), 1.5(-50-0, 45-60); 2.0(32-113), 3.0(-58-32, 113-140 ) Wet Bulb Temperature Range -20-60 / -4-140 Resolution 0.1 / 0.2 Accuracy 1.0(0-45), 1.5(-20-0, 45-60);2.0(32-113), 3.0(-4-32, 113-140 ) Data Update 0.4s Operating Conditions -20-60 / -4-140, 45%-80%RH Storage Conditions -20-60 / -4-140, 45%-80%RH Power Supply 1 * 9V 6F22 battery(Not included) Item Weight 133g Package Weight 223g PackageList:1 * Digital Thermo-Hygrometer1 * Storage Pouch1 * User Manual Note:Please note that this product is for industrial use and cannot be used to measure human body temperature..