GM-2100B-4A This G-SHOCK model features a black resin band with a resin and stainless steel case, paired with a red analog-digital dial for a sharp metal-covered look. Built with shock-resistant construction, mineral glass, and 200-meter water resistance, it is designed for dependable daily wear and active use. Confirmed functions include world time, a 1/100-second stopwatch, countdown timer, five daily alarms, hand shift feature, full auto-calendar, and double LED light, making it a practical choice for users who want a slim octagonal G-SHOCK with bold everyday versatility.