Once it's plugged in, this Lighted Atomic Digital Wall Clock will automatically search for the signal from the National Institute of Standards and Technology to capture the accurate time. Large, two-inch-tall numerals are easy to read, even from across the room. Display also shows the day of the week, the month and the date. The automatic backlight is adjustable to two brightness levels or can be turned off completely. The atomic wall clock features a brushed-metal frame, has an alarm function with snooze and also displays the indoor temperature. Atomic timekeeping ensures accuracy and automatically adjusts for daylight saving time. Comes with an AC adapter and accepts two AA batteries (not included) as a backup. Suitable for wall mounting or use the built-in kickstand for tabletop use.