Synchronized with the cesium fountain clock in Fort Collins, Colorado, this ""atomic"" clock sets itself automatically so you don"t have to, , , and it"s always accurate! It also displays the date, temperature, and relative humidity using great big LCD digits, Requires 2 AA batteries (not included), Atomic LCD wall/desk alarm clock with 2, 5"" time numbers, Date, day of the week, temperature and humidity reading, Has stand for desk use, Three mounting holes in back so clock will not need straightening on the wall, Measures 11"" wide X 9, 75"" high X 1"" deep, Alarm Clock for Wall or Desk Use Stand for Table Use or Wall Mount Atomic Time Set from Radio Signal High Visibility (2, 5"" high Time Numbers) Displays Temperature, Humidity, Day and Date Quickly adjusts for daylight savings tim SKU: RTL21CR109