The Casio G-Shock G-Steel GST-W110D-2AER is a watch for men that gets its energy from light. A new battery is therefore never needed. The watch has a digital quartz movement that shows the time with fluorescent hands. The weekday and date are displayed on the smaller chronographs. In addition, you can also set an alarm, timer or stopwatch as desired. You switch the sounds on or off as desired. Is it dark but do you still want to be able to read the data? No worries. With a slight movement of the wrist, the LED light in the watch automatically turns on.