1, is the clock of the clock, with a mute effect.
2, clock and watch collectively. Clocks and watches are precision instruments that measure and indicate time. Clocks and watches are usually based on the size of the machine to distinguish. According to international practice, the movement diameter of more than 80 mm, the thickness of more than 30 mm for the clock; diameter of 37 to 50 mm, the thickness of 4 to 6 mm, known as the pocket watch; diameter of 37 mm or less for the watch; diameter of not more than 20 mm or machine Heart area of not more than 314 square mm, known as the female form. Watches are one of the smallest, strongest and most sophisticated machines invented by mankind.