"With features such as 20-bar water resistance, a shock-resistant structure, and essential functions like a stopwatch, countdown timer, and alarms, this model reinforces G-SHOCK's trailblazing vision of durability, design, and performance"
Maybe he's into watersports (some of those squirters and golden shower people can really shoot out that pee) and he likes to give 'em a real pounding and doesn't want to risk his watch breaking on the job and he likes to use the countdown timer and an alarm to make sure he gets the time he paid for?