A. Features - Four-in-one multi-functional hygrometer that measures temperature, humidity, wet-bulb temperature, and dew point temperature - Wide measurement range: temperature and wet-bulb temperature from -20 to 60°C (-4 to 140°F), humidity from 0 to 99.9% RH, dew point from -50 to 60°C (-58 to 140°F) - Additional functions include data hold to maintain readings, max/min value display for highest and lowest recorded values, selectable manual or auto power-off, and low battery indicator - Handheld LCD meter with backlit display for easy reading in both bright sunlight and dark environments; compact and lightweight design suitable for pocket storage - Suitable for a wide range of applications including industrial, agricultural, meteorological, medical, household, construction, wine cellars, computer rooms, and data storage facilities B. Specifications - Material: ABS - Temperature range: -20 to 60°C (-4 to 140°F) - Humidity range: 0 to 99.9% relative humidity - Wet-bulb temperature range: -20 to 60°C (-4 to 140°F) - Dew point range: -50 to 60°C (-58 to 140°F) - Auto power-off: 30 minutes - Power supply: 3 x 1.5V AAA batteries (not included) - Product dimensions: 143 x 58 x 26 mm (5.63 x 2.28 x 1.02 inches) - Product weight: 114 g (4.04 ounces) - Package weight: 185 g (6.55 ounces) - Package dimensions: 18.3 x 9 x 5.5 cm (7.20 x 3.54 x 2.17 inches) C. Package List - 1 x Hygrometer - 1 x Small bag - 1 x Instruction manual (in English)