This is the latest model from MASTER OF G, the G-SHOCK series of watches designed and engineered for use by those whose work takes them into extreme environments scattered with rubble, dirt, and debris. The basic black coloring of this model further enhances the rough and tough look of the resin material and the MASTER OF G design. Base model is the RANGEMAN GW9400 with a time stamp feature that lets you record the current time in memory with the touch of a button.