[Automatic Time Updates] – The Atomic Time Feature conveniently allows the clock to sync with the WWVB radio transmission from Fort Collins, CO, for accurate time updates [DAYLIGHT SAVINGS RESET] Automatically resets twice a year for Daylight Saving time (optional ON/OFF) [5-Year Battery Life] – A quality set of 3 “AA” batteries will keep the clock running for up to 5 years – an impressive feat offering unparalleled convenience and peace of mind [MULTIPLE TIME ZONE] 4 selections for Time Zones (Pacific Time, Mountain Time, Central Time, Eastern Time) [A Brand You Can Trust] – Family-owned and operated since 1983, La Crosse Technology is the world leader in Atomic Time and Weather Instruments. Designed in La Crosse, WI, our products have unmatched support resources, including printed setup guides, helpful video tutorials, and lifetime access to our USA-based tech support team