The wireless weather station features 12/24 hour display, date and weekday display, continuous calendar up to 2099, one daily alarm, automatic snooze function, weather forecast using four icons: sunny, light cloud cover, cloudy and rain, Powered by AC/DC, DC power adaptor included. Includes two AAA batteries for the sensor. Thermometer: Indoor measurement ranges: 0°C (32°F) ~ 50°C (122°F) (calibration time: 30 seconds), outdoor measurement ranges: -20°C (-4°F) ~ 50°C (122°F) (calibration time: 3. 4" D x 3.5" W x 7" H