Features 1、Measure temperature and humidity, wet bulb and dew point temperature. 2、Large LCD display with backlight, easy and clear for reading. 3、High accuracy and fast response time. Auto power off and sleep mode. 4、Maximum minimum data and data hold functions. 5、This instrument 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. Specification Color: Black Material: ABS Humidity Range: 0-100%RH Humidity Resolution: 0.01%RH Humidity Accuracy: ±2%RH(at 25°C/77°F, 20%-80%RH); ±2.5%RH(at other) Temperature Range: -40-105°C / -40-221°F Temperature Resolution: 0.01°C / 0.01°F Temperature Accuracy: ±0.5°C/±0.9°F(at 25°C/77°F); ±0.8°C/±1.5°F(at other) Dew Point Temperature: -40-105°C / -40-221°F Wet Bulb Temperature: 0-80°C / 32-176°F Response Time: 0.5s Display: LCD with Backlight Operating Temperature: 0-50°C / 32-122°F Storage Temperature: -10-60°C / 14-140°F Power Supply: 1 x 9V Battery (NOT Included) Product Size: Approx. 215x33x54mm / 8.5x1.3x2.1in Weight: 122g / 4.3oz Package List 1 x Thermometer Hygrometer 1 x User Manual(English)