Reliable Atomic Clocks: Ensures exact time accuracy by syncing with the atomic clock via radio signals. Whisper-Quiet Movement: Silent sweep second hand ensures a peaceful environment, making it perfect for quiet spaces like bedrooms or offices. Clear and Easy-to-Read Display: Features a large, high-contrast dial with bold numbers for effortless readability from a distance. Easy to Set: The time zone can be easily set with the switch. (There are 4 options available: PT-Pacific, MT-Mountain, CT-Central, ET-Eastern). Additionally, the daylight saving time can be manually set for added convenience. Operation Feature: Easy operation with 1 AA alkaline battery (not included).