hito Atomic Radio Controlled Projection Alarm Clock w/Multi-Function Display, Backlight and Extra Night Light- Battery Operated/Adaptor (Black) Atomic Self-setting Alarm Clock: radio-controlled automatic time and date update with Daylight Saving Time (DST). Projects RED lmage of Time and Temperature. Extra nightlight at the buttom of the clock. Multi Function Display: Time(12/24 hr format), Date(mm-dd), Day of the week, Temperature(C/F), Alarm status Alarm & snooze function. Attractive Backlight. Low battery indicator. AC powered (external adaptor, included). Optional battery operated (not included). Two-year Warranty! Clock size: 4.5x 4x 2.1 inches.