The simply designed Casio G-Shock Classic digital watch for men offers shock resistance that s great for your most vigorous sporting activities. The durable rectangular black watch case measures 45mm wide (1.77 inches), and it s matched to a comfortable black resin sports strap. It includes a stopwatch function that can measure events down to 1/100 of a second for the first 60 minutes (and down to 1 second from 60 minutes to 24 hours), and it offers elapsed and split time modes, and 1st-2nd place times. It also has a countdown timer with a 24-hour range. Other timekeeping features include a multi-function alarm, hourly time signal (which can be turned off), and 12/24-hour formats. This timepiece also features an Auto Calendar (pre-programmed until the year 2039), +/-15-second accuracy per month, Afterglow backlighting, and water resistance to 200 meters (660 feet)--which will stand up to the rigors of recreational scuba diving.