50-lap chronograph displays lap times while training or racing. Five segment interval timer for walk/run programs and interval racing. Target time lets you enter target lap times and track progress while racing. View button provides easy access to key info. Convertible display provides simultaneous display of lap and total time. Data mode recalls timimg/lap memory. best lap, average lap and target time differentials for each saved run. Time, date, two time zones, two alarms. Scratch-resistant mineral glass crystal. Nike Electrolite one-touch backlighting. Water-resistant to 100 meters.