Simplify your life with the popular analog-digital combination GMA-S2100 in your choice of smoky, monochromatic colors. The same tough construction of the original GA-2100, but in an even slimmer, more compact design. The flat watch face and simple bar indexes project a minimalist look and feel that shows you know right where you’re going. A casual, comfortable G-SHOCK in stylish solid colors.plify your life with the popular analogue-digital combination GMA-S2100 in your choice of smoky, monochromatic colours. The same tough construction of the original GA-2100, but in an even slimmer, more compact design. The flat watch face and simple bar indexes project a minimalist look and feel that shows you know right where you’re going. A casual, comfortable G-SHOCK, the GMA-S2100BA-4AER is finished in a easy to wear subtle shade of pink.