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. Features: Measure temperature & humidity, wet bulb and dew point temperature. Large LCD display with backlight, easy and clear for reading. High accuracy and fast response time. Max./Min. data and data hold functions. Auto power off and sleep mode. Specifications: Color: Black / Red(Optional) Material: ABS Humidity Range: 0~100%RH Humidity Resolution: 0.01%RH Humidity Accuracy: plus or minus 2%RH(at 25 degree Celsius /77 Fahrenheit degree , 20%~80%RH); plus or minus 2.5%RH(at other) Temperature Range: -40~105 degree Celsius / -40~221 Fahrenheit degree Temperature Resolution: 0.01 degree Celsius / 0.01 Fahrenheit degree Temperature Accuracy: plus or minus 0.5 degree Celsius / plus or minus 0.9 Fahrenheit degree (at 25 degree Celsius /77 Fahrenheit degree ); plus or minus 0.8 degree Celsius / plus or minus 1.5 Fahrenheit degree (at other) Dew Point Temperature: -40~105 degree Celsius / -40~221 Fahrenheit degree Wet Bulb Temperature: 0~80 degree Celsius / 32~176 Fahrenheit degree Response Time: 0.5s Display: LCD with Backlight Operating Temperature: 0~50 degree Celsius / 32~122 Fahrenheit degree Storage Temperature: -10~60 degree Celsius / 14~140 Fahrenheit degree Power Supply: 1 * 9V Battery (NOT Included) Size: 215 * 80 * 45mm / 8.46 * 3.15 * 1.77in Weight: 122g / 4.3oz Package Size: 26 * 10 * 5cm / 10.24 * 3.94 * 1.97in Package Weight: 186g / 6.57oz Package List: 1 * Thermo-Hygrometer 1 * User Manual(English)