Quartz movement Protective mineral crystal protects watch from scratches Case diameter: 40 mm LED Light with after glow, Dual Time, 1/100 second stop watch, Daily Alarm, Hourly time schedule The Casio Men's 10-Year-Battery Sport Watch is lightweight and includes an enduring battery any athlete would envy. The timepiece is constructed with a sturdy polyurethane case, a resin bezel, and a sturdy resin wristband with an adjustable buckle clasp for the perfect fit. A durable mineral window shields the gray digital dial, which features the time, as well as a discrete day-and-date display along the top of the dial. This sporty timepiece also includes four buttons to personalize your workout. In addition, this watch is water resistant to 330 feet.