A. Features - It's a four-in-one multi-functional hygrometer. It can measure temperature, humidity, wet-bulb temperature, and dew point temperature. - It has a wide measurement range. The temperature and wet-bulb temperature range from -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit), the humidity range is from 0 to 99.9% relative humidity, and the dew point range is from -50 to 60 degrees Celsius (-58 to 140 degrees Fahrenheit). - The thermo-hygrometer has more features. It has a data holding function to keep the reading, a maximum/minimum value function to display the highest/lowest reading on the display. Manual/auto power-off can be selected, and there is a low battery indicator. - It's a handheld LCD meter. This anemometer is equipped with a backlit LCD display, which makes it easier to read data both in sunlight and in the dark. It is compact and lightweight and can be put in a pocket. - It has wide applications. It is widely used in industries such as industry, agriculture, meteorology, medical care, daily life, construction engineering, wine cellars, computer rooms, and data warehouses. B. Specifications - The material is ABS. - The ambient temperature range is -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit). - The ambient humidity range is 0 to 99.9% relative humidity. - The wet-bulb temperature range is -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit). - The dew point range is -50 to 60 degrees Celsius (-58 to 140 degrees Fahrenheit). - The auto power-off time is 30 minutes. - The power supply requires 3 pieces of 1.5V AAA batteries (not included). - The product size is 143 * 58 * 26 mm / 5.63 * 2.28 * 1.02 inches. - The product weight is 114 g / 4.04 ounces. - The package weight is 185 g / 6.55 ounces. - The package size is 18.3 * 9 * 5.5 cm / 7.20 * 3.54 * 2.17 inches. C. Package List - 1 meter - 1 small bag - 1 instruction manual (in English)