The GST-W100D-1A2ER Wristwatch has many functions that go beyond the use of a normal wristwatch. In addition to an integrated Full-Auto Led Light to illuminate the background in darkness, whereby the display automatically lights up with a slight rotation of the wrist, this watch includes a world time function that displays times in up to 29 different time zones. The watch also receives the corresponding radio signal of the local time zone and thus always displays the exact time. In addition to a fluorescent neo-display, which glows in the dark when illuminated, this watch model has solar cells for an environmentally friendly and independent energy supply. Excess energy is stored in a rechargeable battery and a control display keeps you informed about the battery charge. Thanks to 5 different daily alarms, the Casio digital watch reminds you of recurring events and appointments every day and to the minute. The expiration of every full hour is indicated to you by an acoustic signal, which can also be turned off if you wish. The button tones that sound when you switch from one function to the next can be switched off as desired. With its stainless steel resin case, scratch-resistant mineral glass for high stability and a classically elegant stainless steel bracelet with safety clasp, the Casio digital watch not only impresses with its shock resistance, but also with its appearance.