Ideal for travelers in dark hotel rooms, this packable alarm clock projects the time onto any ceiling in red numbers that are easily read at night. An LCD screen with luminous blue backlight displays the time, date, day, and temperature.
You’ll always be on time thanks to an internal receiver that uses signals from the official U.S. atomic clock to maintain permanent self-adjusting accuracy.
n the U.S., the accuracy and speed that your clock and watch will receive signal updates depends on your proximity to the U.S. atomic clock in Fort Collins, CO. This means that the majority of personal atomic clocks and watches will synchronize only within the continental United States, and may not synchronize correctly in Hawaii or Alaska or on continents other than North America. Personal atomic clocks and watches work only in some areas of Canada and Mexico.
Another limitation of personal atomic clocks and watches is that they may not receive the NIST (National Institute of Standards and Technology) signal within large buildings containing steel construction. Moving clocks and watches closer to windows in these types of buildings will usually resolve the synchronization problem.
Limited Offer: Spend $100, get $20 off your next purchase!
Make a product purchase of $100 or more from the National Geographic Online Store from 11/3/14 to 11/26/14 at 11:59 p.m. PT, and receive an e-mailed promotion code the following day for $20 that may be redeemed in the National Geographic Online Store. Shipping and handling, taxes, and prior purchases do not apply toward the minimum $100 purchase requirement.
To redeem your promotion code, spend $20.01 or more in merchandise and enter the unique promotion code at checkout in the National Geographic Online Store. Limit one per customer per order. $20 cannot be applied toward digital products; magazines; Genographic kits; donations; gift boxes; shipping and handling; taxes; Weekend Photo Workshops; or CafePress, Barton Cotton, or NG Art Store merchandise. Promotion code may not be combined with certain other offers or discounts; not valid on previous orders and not redeemable for cash. Applies to online orders only. Entire $20 must be used one time in a single transaction; any remaining balance will be forfeited. After promotion code has been applied to order and the order has been submitted, the promotion code is no longer valid. $20-off promotion code is valid through 12/31/14 at 11:59 p.m. PT. Prices not valid in the National Geographic UK Online Store or in the Road Less Traveled Store. Offer is nontransferable and may be modified or canceled at any time. Promotion code is void if items are returned and refund for returned items lowers total order value to less than $100. Offer cannot be resold or bartered.