The Casio G-Shock Classic GA-100-1A1ER is a sporty mens watch. The watch is waterproof up to 200 meters and shockproof, making it suitable to wear when exercising. The G-Shock also has several useful functions, such as an alarm, stopwatch, timer, world time, and date display. The alarm helps you remember recurring and special events at a time you set beforehand. With a slight tilting motion of your wrist, LED lights illuminate the watch face making it easy-to-read, even in the dark. The watch face features hardened mineral-glass and the plastic wrist band gives you a sporty appearance.