The UltrAtomic wall clock features the most accurate atomic movement on the market. Like a traditional atomic clock, this clock automatically sets itself and updates for Daylight saving time. However, this clock is equipped with two antennas that allows it to work in the nosiest, hostile electronic environments such as busy office buildings, hospitals, or other institutions. With this enhanced reception UltrAtomic clocks increases the WWVB signal reliability and penetration. No more worrying about changing out batteries every year, with its additional battery compartment you’ll keep your UltrAtomic clock running longer. This feature keeps the batteries in your clock running for approximately 3 to 5 years before you would need to replace. Optional ECO-MODE feature is a battery saving feature that will pause the second hand at 12:00 during the hours of 11:00pm-5:00am. Wrapped in a modern 14" stainless steel frame with a plastic shatter-proof lens, this clock attracts in a commercial or residential space.