With perfect time, a wood-finish frame, and completely wireless, this self-setting wall clock from La Crosse Technology is as reliable as it is handsome. A 12-inch diameter face makes this wall clock easy to read from a distance. The clock is equipped with a receiver that picks up signals from the U.S. Atomic Clock, automatically setting itself to exact time accurate to the second. A manual override setting lets you set date and time yourself for areas where Daylight Savings Time doesn"t apply. The clock comes with 4 time zone settings. Easy to operate, the clock requires just one "AA" alkaline battery. A white dial and a wide, solid wood surround with a beautiful walnut finish dresses up any home, office, or classroom. Classically elegant, this analog atomic wall clock is perfect both for the executive or professional office and for the home. You"ll know when the battery needs changing with this clock"s low-battery mechanism: the second hand begins jumping 2 seconds at a time. That"ll only happen about once per year. Everytime the Battery is taken out of the display, resets the system and searching for the Signal again. And due the nature of Earth’s Ionosphere; reception is very limited during daylight hours. The ionosphere is higher at night so the signal wave is long and travels better. That’s why we recommend placing the display on a window facing Ft. Collins, Colorado to help assist in getting the signal and item needs to be allowed 3-5 nights for the Atomic time to update. For the clock to work properly; Use Fresh batteries Place display on a window facing Ft. Collins, Co Select correct time zone DST is set to ON. (unless lives in an areas that does not observe DST) Allow 3-5 nights for the Atomic time to update Note:To avoid interference place the display at least 3 to 6 feet away from Refrigerators, air conditioners, household appliances or other devices with electric motors. And in basements the signal quality is lessen if a radio-controlled product is placed in a basement or other underground locations.