Features 12/24 hour display, date and weekday display, daily alarms and an automatic snooze function. Barometric pressure trend indicator and moon phase indicator to detect high/low tides. Two AAA batteries for the sensor are included. Powered by AC/DC, DC power adaptor included. Outdoor temperature ranges between -20°C (-4°F) and 60°C (140°F). In/outdoor temperatures, indoor humidity display. Includes weekday display in eight different languages, colorful display and a continuous calendar up to. 2.125" D x 6.375" W x 4.75" H