The Atomic Alarm Clock with indoor/outdoor temperature gives you all the time and weather info you need. Time display is always accurate because it's regulated by a radio signal continuously received from the government's atomic clock in Colorado. And you'll know exactly what to wear each day, because the outdoor temperature is also displayed, thanks to the wireless remote temperature sensor included; 80' range. Unique LCD "Weather Man" gives you an idea how much you need to wear to stay warm (based on barometric pressure)! LCD digital display shows hours, minutes and seconds (12- or 24-hour format), day and date, plus inside and outside temperature, and indoor humidity. Time alarm with snooze. Time-zone setting; DST on/off option. Calculates sunrise/set based on your location. Night-view backlight. Signal-reception indicator. The Atomic Alarm Clock with "Weather Man" hangs on a wall, or use the easel stand. Clock is 4-1/4" x 6" x 1-1/4" thick and is powered by 3 AA batteries, not included. Wireless outdoor sensor requires 2 AA batteries, not included.