Casio AQ-S810W-8A3VEF

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 watch's power supply. Excess solar energy is stored in a battery. The world time function displays the time in up to 29 different time zones. Elapsed time, intermediate time, and end time are measured with an accuracy of one-hundredth of a second. The watch's measurement capacity extends up to one hour. This model features two independent countdown alarms (timers) that emit a signal after a set time has elapsed and then automatically count down again from the preset time. The measurement capacity of the watch extends up to 100 minutes and can be set in 5-second increments. The daily alarm reminds you of recurring events with an acoustic signal at the set time. This model has five independent alarms, which is particularly practical for daily medication intake or keeping regular appointments. If desired, the button sounds can be turned off using the mode button. Once turned off, there will be no beep when switching from one function to another. However, set alarms or countdown timers remain active even after the button sounds are turned off. Once set, the automatic calendar always displays the correct date. The time display can be set to either a 12-hour or 24-hour format. In 12-hour mode, a "p" in the display indicates the second half of the day, from 12 noon to 11:59 PM. The surface of the watch glass is curved, providing high stability and resistance to pressure.