Our consumer electronics products include radio-controlled clocks and watches, wireless weather stations, power monitors, and other measuring devices. We introduced radio-controlled clocks to the US market in 1991 and continue to be on the cutting edge of this technology in America. Our weather instruments, clocks and watches are calibrated daily to the atomic time standard of the National Institute of Standards and Technology. Atomic Time and Date with Manual Setting. 12/24 Hour Time. Calendar: Month, Date, Day. Daylight Saving Time Automatically Updates (DST) (On/Off Option). U.S. Time Zone Selection: Eastern, Central, Mountain, Pacific. Time Alarm with Snooze. Wall Hanging or Free Standing. Indoor Temperature:14.1 degrees F to 139.8 degrees F (-9.9 degrees C to 59.9 degrees C). Power Requirements: 2 "AA" Alkaline Batteries (not included). Battery Life: Up to 24 months. Color: Black. Clock dimensions: 8.95" x 7.2" x 1.2".