GA-100A-9A is a bold G-SHOCK analog-digital watch featuring a black resin case and matching resin strap accented with yellow details for a high-impact, sporty look. It is powered by a reliable quartz movement and includes shock resistance, 200-meter water resistance, world time, stopwatch, countdown timer, alarms, and an LED backlight, making it a durable and functional choice for everyday wear, sports, and active use.