This Casio G-Shock Clock offset at the sight of a 80's immediately in the years back. This model was launched in 1983 as a first clock of Casio G-Shock series. 25 years later Casio put this model in the exact same design on again with the latest technology of today. Thus, the Casio G-Shock GW-M5600 was born ... I have this clock now indulged, and am totally excited about it. The clock thanks to wireless technology and solar powered with battery storage not what you have to take care of. The clock always shows just the exact time and invites himself constantly with new energy by day and artificial light more than sufficient. Even after unpacking the clock, which is delivered in a stylish box G-Shock, the battery status indicator showed to H for high. In addition, these modern retro clock brings some further technical highlights. For example, the automatic lighting function by a position sensor the the screen at a certain arm movement illuminated. I have, however, turned off because I wear the clock even during sleep This function, and it then it often happens that the display amazing brightly lit Green Blue at arm movement. One can also conventionally by pressing a button illuminate the display. The auto light switch is controlled only from a certain surrounding darkness activates the function via a light sensor. The light sensor is also used for a more practical function of the GW-M5600, the power saving function. Actually, the clock has certainly not necessary since it is supplied daily by light with sufficient energy. The energy saving feature turns the display off if the clock has been some time in total darkness, however, only 22:00 to 6:00 clock. This feature can also be disabled if you want. Time synchronization via radio works every night without problems, indicated by the reception indicator on the display. The clock has 5 alarms, one of them with snooze function, a stopwatch and a countdown timer as well as a lot of world times. The Casio these the weekday display only in English, plus the date format month-day I do not find disturbing, that was also the time otherwise ... And this clock is supposed to remind us of that time, only now with a technique of the had not been discovered at that time ... The digital display is very contrast and can be read by always perfect. The resin plastic strap fits comfortably on the arm, and as the clock is very easy no one notices it. Of course, this clock is waterproof up to 20 bar and up by G-Shock by bringing almost no outside influences into trouble. This clock gets fully deserves 5 stars