The Casio G‑Shock GM‑2100B‑4ADR delivers a bold yet refined aesthetic, featuring a black resin case and band paired with a striking red ion-plated stainless steel bezel. This fusion of metal and resin creates a lightweight yet robust design that stands out in both sporty and urban settings.

Equipped with renowned G‑Shock durability, it resists shocks, magnetic fields, and offers 200‑meter water resistance. The GM‑2100B‑4ADR includes accurate timekeeping functions such as world time across 31 time zones, a 1/100‑second stopwatch, countdown timer, and five independent daily alarms with snooze capability. Its full auto-calendar is pre-programmed until 2099. Visibility is enhanced via a super-bright LED backlight, and the precise quartz movement ensures reliable performance. Powered by a CR2016 battery, the watch offers approximately three years of continuous use.

With a sleek, slim profile measuring approximately 48.5 × 45.4 × 11.8 mm and weighing around 72 grams, the GM‑2100B‑4ADR combines a stylish metalized look with practical wearability. It’s the ideal pick for those who want a sharp, feature-rich G‑Shock that blends urban flair with everyday resilience.