RETRO-DESIGN Big Ben Moonbeam Clock. Looks just like the original from the 1950's! Features gentle blinking-light alarm as well as bell alarm. Fully lighted dial stays lit all night. Gold Tone Base fits with every decor. The Moonbeam clock works on DC power, but features battery back-up, making it a timepiece you can count on. This analog clock with three-hand display is powered by 120V ac, 60Hz current from a wall outlet. Length 6.75" Width 6.5" Height 5" Once dubbed The Considerate Alarm, it gradually wakens sleepers with a flashing soft light that increases in intensity. After 4 minutes, it sounds a bell alarm to waken heavier sleepers. The fully illuminated dial allows for easy reading even in the dark and lends ambiance to the room. Updated from the original design, the Moonbeam has an electric analog movement, (2 AA batteries, not included).This model is an updated model and has an led light display .