Three large LCDs simultaneously display time, temperature (°C or °F) and humidity. Measures temperature from -4.0 to 122°F (-20.0 to 50.0°C) with an accuracy of ±1.8°F (±1.0°C) and relative humidity from 25 to 95%RH with an accuracy of ±5%. Memory with reset function stores minimum and maximum measurements for temperature and humidity. Clock function automatically displays 12 hour time with AM/PM indication when in °F mode, and displays 24 hour time when in °C mode. Unit operates on 1 AAA battery (included), measures 4.3” x 2.8” x 0.8” and weighs 4 oz. Comes complete with instructions, built-in tilt stand and wall mounting bracket. 1-year warranty.