Each of the clock's four faces measures 43 m (141 ft) in diameter and are illuminated by 2 million LED lights, with four oriented edges, just above the clock alongside huge Arabic script reading: "God is [the] greatest" on the north and south faces and on the west and east "There is no god but Allah. Muhammad is the messenger of God.". Four golden domes on pillars on all the corners are also present. The same as the Saudi Flag, fitted at the top of the clock, flash to signal Islam's five-time daily prayers. On special occasions such as new year, 21,000 green and white xenon bulbs and LED lamps during the call to the five prayers times of the day. On special occasions, 40 beacons lights allow innumerable variations of splendid lighting effects. In. addition, the world's strongest four show lasers throw their rays 30 kilometers into the sky. The clock's four faces are covered with 98 million pieces of glass mosaics. The Saudi coat of arms is displayed at the center of each clock behind the dials. The minute hand is 23 m (75 ft) long, while the hour hand is 18 m (59 ft) long.
