Features: 4-in-1 Multifunction Hygrometer: it not only can measure temperature and humidity, but also measure wet bulb, and dew point temperature. Wide Range of Measurement: -20-60 (-4-140) of temperature and wet bulb temperature, 0-99.9%RH of humidity, -50-60 (-58-140) of dew point. More Features of Thermo-hygrometer: data hold function, can hold the reading; MAX/MIN function, it will show the highest/lowest reading on the display; manual / auto power OFF optional; low battery indication. Handheld LCD Screen Meter: this wind speed gauge equipped a LCD screen with backlight, can reading better and clearer both under sun or in dark. Compact and lightweight, you can keep it in pocket. Wide Applications: it is widely used in industry, agriculture, meteorology, medical, daily life, building engineer, in wine cellar, machine room and data storeroom. Specifications: Material: ABS Ambient Temperature Range: -20-60 (-4-140) Ambient Humidity Range: 0-99.9%RH Wet Bulb Temperature Range: -20-60 (-4-140) Dew Point Range: -50-60 (-58-140) Auto Power-off: 30 minutes Power Supply: 3 x 1.5V AAA battery (NOT included) Item Size: 143 x 58 x 26mm / 5.63 x 2.28 x 1.02in Item Weight: 114g / 4.04oz Package Weight: 185g / 6.55oz Package Size: 18.3 x 9 x 5.5cm / 7.20 x 3.54 x 2.17in Package List: 1 x Meter 1 x Pouch 1 x Manual (English) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.