The beautiful Casio GA100-1A4 watch features a black resin 51.2mm case, with a fixed bezel, and a black dial covered by a mineral crystal. The stylish wristwatch is equipped with an exclusive resin which combines comfort and sturdiness. This horological trendy device has day, date, 1/1000th second stopwatch, speed indicator. hourly time signal. auto-calendar. daily alarm. countdown timer. backlight auto led light with afterglow. 12/24-hour formats. world time 29 times zones (48 cities + utc)., hour, minute, second functions. At the heart of this timepiece is Casio Calibre 5081. The Quartz movement keeps the hands revolving smoothly and accurately for precise, reliable timekeeping. It picks up all the advantages of this high-performance âengineâ. This magnificent watch has a water resistance of up to 660 feet/200 meters, suitable for short periods of recreational swimming. This elegant masterpiece is sure to complete any man's collection.