Ken-Tech LCD ALARM CLOCK T-4438 Worlds Smartest Flashlight! This precision time piece automatically sets itself to signals from the official U.S. atomic clock...accurate within one millionth of a second Just set to your time zone and it automatically resets to and from daylight savings time Plus, you get alarm, calendar with month/day/date & temperature & flashlight with carry strapall in one 5 long unit Runs on 2 AAA batteries