Marathon CL030051BK Atomic Alarm Clock with Auto-Night Light, Temperature & Date - Batteries Included with Easy Control Front Buttons. LARGE DISPLAY - Large, easy to read display with time, day, date and temperature AUTO-NIGHT LIGHT - Ambient light sensor detects low light and activates backlight SELF-SETTING/ADJUSTING - Using radio frequencies broadcast from NIST's Colorado Atomic Clock FRONT-FACING - EASY ACCESS BUTTONS - Conveniently located buttons make it easy to operate even in the dark MULTIPLE TIME ZONES: You can easily switch between 6 time zones (Pacific, Mountain, Central, Eastern, Atlantic & Newfoundland)