This vintage retro alarm clock is 4 inches in diameter, metal frame antique design will add funky retro decorative feel to your bedroom, bedside, bookcase, TV table, fireplace mantle etc. Quartz analog clock offers a very silent non-ticking movement and accurate time. This bedside alarm clock has a beep noise that starts out at one pace and progressively get faster and louder in 4 stages. A big alarm switch ensures you turn the alarm on/off easily. There's a button in the back to press and hold to turn the light on, so it's not using up battery juice keeping it lit all the time - only when needed. Its an easy basic battery operated alarm clock, run by 1 AA battery (not included), easy for elderly kids.