The Casio G-Shock GA-100A-9ADR Velocity Indicator Alarm Watch combines analog and digital displays in a robust blue resin case designed for demanding environments. This sports watch features G-Shock shock resistance technology and magnetic resistance for reliable performance under challenging conditions. With a water resistance of 200 meters, it withstands professional marine activities and surface water sports. The 55 mm case, with a thickness of 16.9 mm, houses a mineral glass that protects both the analog hands and the digital display. Key features include a speed indicator for measuring speeds over 1225 units per hour, a 1/100-second stopwatch, a countdown timer, and world time with 29 time zones across 48 cities plus coordinated universal time. The watch offers five independent daily alarms, including four one-time alarms and a snooze alarm, along with hourly time signals. Time accuracy remains within +/-15 seconds per month using quartz movement, with an automatic calendar function programmed until the year 2099. The analog display features hour and minute hands that move every 20 seconds, while the digital display shows hour, minute, second, PM indicator, month, date, and day. Practical features include LED lighting with an automatic light switch, selectable duration settings, and afterglow for visibility in low light conditions. The screw-down case back ensures enhanced protection, while the fixed bezel and index markings complete the durable construction. Suitable for various activities from sports to professional use, this timepiece delivers reliable performance with comprehensive timing functions in a striking blue color scheme.