A solar panel converts even weak illumination from flourescet lighting into electric power. A rechargeable battery with a large power storage capacity supports stable operation of various functions with high electricity consumption. You never have to worry about the battery running down because its a solar battery.
G-SHOCK watches with Wave Ceptor technology receive radio signals in most parts of Europe - some models even in the USA, parts of Canada and Mexico, in Japan or China. The radio watch decodes the relevant signal and displays the exact local time.
