A. Features<br> - It's a four-in-one multi-functional hygrometer. It can measure temperature, humidity, wet-bulb temperature, and dew point temperature.<br> - 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).<br> - 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.<br> - 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.<br> - 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.<br> B. Specifications<br> - The material is ABS.<br> - The ambient temperature range is -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit).<br> - The ambient humidity range is 0 to 99.9% relative humidity.<br> - The wet-bulb temperature range is -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit).<br> - The dew point range is -50 to 60 degrees Celsius (-58 to 140 degrees Fahrenheit).<br> - The auto power-off time is 30 minutes.<br> - The power supply requires 3 pieces of 1.5V AAA batteries (not included).<br> - The product size is 143 * 58 * 26 mm / 5.63 * 2.28 * 1.02 inches.<br> - The product weight is 114 g / 4.04 ounces.<br> - The package weight is 185 g / 6.55 ounces.<br> - The package size is 18.3 * 9 * 5.5 cm / 7.20 * 3.54 * 2.17 inches.<br> C. Package List<br> - 1 meter<br> - 1 small bag<br> - 1 instruction manual (in English)