CHICAGO LIGHTHOUSE 9.75″ DIGITAL ATOMIC CLOCK WITH CALENDAR AND INDOOR TEMPERATURE DISPLAY ¿ SILVER THIS DIGITAL ATOMIC CLOCK IS HIGHLY ACCURATE, UPDATED DAILY BY RADIO SIGNAL FROM COLORADO FOR 48 STATES OF CONTINENTAL USA. DISPLAYS HOURS, MINUTES, SECONDS, DATE, MONTH, DAY, AND INTERNAL TEMPERATURE. 12/24 HOUR OPTION, DUAL ALARMS AND SNOOZE. FOR WALL OR DESKTOP DISPLAY. REQUIRES 2 AAA ALKALINE BATTERIES (NOT INCLUDED)..