Large Size-- Size: 5.5" x 5.5" x 2.2". Alarm clock stands up at an angle, high quality plastic, square face with white dial, black Arabic numerals, good decoration for tabletop, desk & shelf, bedrooms. Also large size screen and clear bold digits to display time, perfect alarm clock for elderly. Completely Silent-- Super quiet concise design alarm clock without annoying tick tock sound, ideal for those who need complete silence to fall asleep. Snooze and Manual Light-- Snooze and light button locates on easy-to-find top place. Hold button down for 5 minutes snooze or to light up the clock face on demand to see the dial momentarily in the darkness. PRESS TO LIGHT- NO auto-light. Gentle Wake Increasing Volume-- Classic beep alarm sounds, designed to ascending four stages for gentle wake at first, then ascend in volume with more and more hurried sounds, which last for nearly 1 hour or stop/suspend when alarm is turned off or snooze bar is depressed. Battery Powered-- Runs on 1 "AA" Battery (not included ).