1.8" Alarm Clock Radio With Digital PLL AM/FM Radio, Battery Backup That Maintains Clock & Alarm Operation In The Event Of A Power Loss, Large 1.8" Red LED Display, Easy To Read At Night, Snooze Alarm Function, Wake To Alarm/Radio, Digital Volume Control, AC Operation AC Adapter Included, Uses 2 "AAA" DC 3V Battery For Clock Back Up Not Included.