The world clock consists of time displays located in several cities in different time zones. The world is divided into 24 time zones. Usually, the world clock selects 9 to 16 among them. The time of a representative city in different time zones is displayed. The digital or analog sub-clocks representing the time of each city receive the time-calibration signal sent by the central master clock to calibrate the time, so that the time is synchronized with the GPS time. In the case of failure of the master clock, the world clock can work independently.

The common city names displayed by the world clock are: Beijing, Tokyo, New York, Los Angeles, Paris, Vancouver, London, Berlin, Moscow, Sydney, Singapore, Cairo, New Delhi, etc.

The world clock has manual time correction and automatic time tracking functions, and is equipped with a reset button and a power switch.

The way to display the time can choose the color and shape of the shell according to the decoration style of the passenger terminal.

The world clock is installed on the background wall of the lobby of the international departure area of the airport and the five-star hotel. The world clock is generally made of aluminum alloy or plastic. Aluminum plate (for reference only), the world map is matte stainless steel or honeycomb aluminum plate (for reference only).

Model meaning of world clock:

Example: The digital sub-clock with 12 time zones displays "hour:minute", and the model of the world clock with a face length of 5.5 meters can be written as CJ-W12S550.