1. Features - Four-in-one multi-functional hygrometer: It can measure not only temperature and humidity but also wet-bulb temperature and dew point temperature. - 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). - More features of the thermo-hygrometer: Data holding function to keep the reading; Maximum/minimum value function to display the highest/lowest reading on the display; Manual/auto power-off can be selected; There is a low battery indicator. - Handheld LCD meter: This anemometer is equipped with a backlit LCD display, making it easier to read data both in sunlight and in the dark. It is compact and lightweight and can be put in a pocket. - Wide applications: Widely used in industries such as industry, agriculture, meteorology, medical care, daily life, construction engineering, wine cellars, computer rooms, and data warehouses. 2. Specifications - Material: ABS - Ambient temperature range: -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit) - Ambient humidity range: 0 to 99.9% relative humidity - Wet-bulb temperature range: -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit) - Dew point range: -50 to 60 degrees Celsius (-58 to 140 degrees Fahrenheit) - Auto power-off time: 30 minutes - Power supply: 3 pieces of 1.5V AAA batteries (not included) - Product size: 143 * 58 * 26 mm / 5.63 * 2.28 * 1.02 inches - Product weight: 114 g / 4.04 ounces - Package weight: 185 g / 6.55 ounces - Package size: 18.3 * 9 * 5.5 cm / 7.20 * 3.54 * 2.17 inches 3. Package List - 1 meter - 1 small bag - 1 instruction manual (in English)