Dynamic color display with large 1.50-inch time in 12-hr or 24-hr mode Accurate Atomic Time and DST resets with time alarm and 10-minute snooze; Moon Phase display Continuous backlight (adjustable settings with power cord); On-demand only illumination with 2 AAA alkaline batteries (not included) 1 Amp USB charge port and monitors indoor temp (F/C) with humidity and trend indicators TIME SET: press SET button to start, using +/- buttons to change values, and confirming press/release SET to move to next option. ALARM SET: press ALARM button to start, using +/- buttons to change values. Press ALARM to set. BELL icon will indicate the alarm is active.