This large number digital alarm clock is easy to see and simple to use! Jumbo 1.8" digital display in blue LED light. AC-powered (wall plug-in) with battery backup (2 AA; not included). Has a 4-stage ascending alarm; snooze duration of 9 minutes. Easy alarm on/off switch on side. Bonus: has a USB Port in the side to charge your phone, camera, etc. while you sleep! Measures 7.25" wide by 4.1" high by 2.1" deep.