G-Shock Watch Alarm. Introducing a new collection of basic-black additions to the popular G-Shock watches Big Case Series. Touches of red and other colours provide great looking accents against the basic black of the cases, bands, digital displays, bezel lettering, and buttons. Super Illuminator and a 3-dial face, and the GD-400 comes with protector for the areas where the band joins the watch, which protect against impact from the back of the watch.