The Casio Tactical G-Shock GD-010 Series Digital Watch is a large-case digital model designed for fewer battery changes and dependable daily utility. Built with bio-based carbon and resin components plus Carbon Core Guard structure, it combines shock resistance, 200 m water resistance, and mineral glass with an approximate 10-year battery life on CR2025 power. Core functions include Multi Time for 4 cities, world time across 31 time zones and 48 cities plus UTC, 1/100-second stopwatch, 24-hour countdown timer, 5 alarms, hourly signal, Super Illuminator LED backlight, full auto-calendar to 2099, and standard daily timekeeping displays.