The Westclox 1950 Moon Beam Big Ben Alarm Clock, model 43000, is a flashing alarm clock designed for use by individuals who are deaf or hard of hearing. This analog alarm clock flashes for four minutes to rouse sleepers; a bell sounds after four minutes. The illuminated clock face is modeled after Big Ben, with Arabic numerals and hands protected by a convex lens. This clock also features a snooze button. The clock uses a 25-watt replaceable bulb. POWER: Uses household current for regular operation and two double-A batteries for back-up in the event of a power outage. DIMENSIONS (HxLxW): 5 x 2 x 6.5 inches. The power cord is 58 inches long. COLORS: Soft yellow case with gold-toned base; white clock face with brown numerals.