To ensure that everything is visible even in dark environments, the watch's display is illuminated by a LED at the push of a button. Independent and environmentally friendly, solar cells provide the power supply for the watch. Excess solar energy is stored in a battery. Whether in Europe, North America, and Japan, or in large parts of Canada, Central America, and China - once the watch is set to the local time zone, it receives the corresponding radio signal and always shows the exact time. In many countries, it also independently adjusts for daylight saving time and standard time. The world time function displays the time in up to 29 different time zones.