Introducing the new rugged style of G-STEEL models that feature Carbon Core Guard structures. These new models adopt tough G-SHOCK styling with a disk indicator at 6 oclock that shows the current mode and charge level, and a front button that completes the overall rugged look. The disk, a round graphic digital display between 1 and 2 o'clock, and a digital display as 12 o'clock add to both functionality and looks. The GSTB300SD has a mirror finish stainless steel band.
| Brand: | Casio |
| Band Color: | Stainless Steel |
| Band Material: | Stainless Steel |
| Calendar: | Full auto-calendar (to year 2099) |
| Case Diameter (MM): | 51 |
| Case Material: | Carbon/Stainless Steel |
| Clasp: | Buckle |
| Collection: | G-SHOCK |
| Crystal: | Mineral |
| Dial Color: | Grey |
| Display: | Analog/Digital |
| Gender: | Men's |
| Watch Movement: | Quartz |
| Water Resistance (M): | 200 |
| Features: | Shock Resistant, Carbon Core Guard structure, Mineral Glass, Neobrite, 200-meter water resistance, Double LED light, Tough Solar (Solar powered), Mobile link (Wireless linking using Bluetooth®), World time, 1/1000-second stopwatch, Countdown time, 5 |