The Casio G-Shock Mini CasiOak GMA-S2100-4A2 is a dual analog-digital watch that downsizes the original GA-2100 to create a thinner and more lightweight model. This version of the Casio G-Shock has an octagonal bezel made of resin with button labels and the G-Shock branding embossed into it. The resin band, watch face, and watch case all come in a salmon color. Metallic salmon bars mark the hours on the watch face, while a small digital window in the bottom left corner also shows the time. The watch face also features a small analog day marker on the left. This watch features the Carbon Core Guard structure that is iconic among G-Shock watches, giving the watch its famous strength and resistance. It gives the watch a streamlined design, allowing it to be casual but still stand out. The Casio G-Shock Mini CasiOak GMA-S2100-4A2 was first released in March 2021 for a retail price of $130.