Seiko Ultimate Alarm Clock - Black Case  Product Description: For the easiest to use, most readable bedside alarm, get the Seiko Ultimate Alarm Clock . . . . Easy-to-set alarm feature - simply rotate the large dial at the bottom right of the clock case - no fumbling with tiny knobs in the back of the clock. . . A light sensor (bottom left in picture) makes clock glow softly when the room is dark. . . Press the button at the top of the clock and the dial glows brighter - green if the alarm is set and amber if not . . Quiet sweep second hand means no ticking sound in the middle of the night. . . Large, easy to read numerals and luminous hands for night-time visibility . . Ascending alarm starts softly and gets louder . . Snooze feature resets alarm to ring again in a few minutes . . Approximate dimensions 4 3.4" x 4 1/2" x 2 3/4" . . Takes three AA batteries and fresh ones are included with your purchase . .