Compact Design, Large Display: Small footprint (5.9"x3.11"x1.65"), large white LED numbers, easy to read day or night, display brightness easily adjustable from 0% to personal preference to 100%. 5 selectable alarm sounds: choose your favorite among 5 alarm sound options: (beep/buzzer/bird/piano music/soft music) USB charging port: The integrated USB port charges compatible smartphones and other devices while you sleep. (USB cable not included) Easy-to-use snooze function: experience zero stress when setting the time or alarm. Power supply and battery backup: Comes with a 3-pin plug to plug into a wall outlet to power the clock, and you can choose to use 3 AAA batteries (not included) to back up time and alarm settings in case of a power outage. The PXCL team is at your service and we hope you enjoy your life!