The Timex 250lap Sleek Ironman is the ideal watch for athletes who are following training programs that focus on time and pace, distance, and cadence. The built in speed and distance sensor works without GPS for use indoors and constant charging is a thing of the past.Save and review workouts from Stopwatch and Timer modes.Lap management system allows easy access to 250 laps of dated training logs and lockable key times.hydration and nutrition alarms remind you to refuel at regular intervals.100 hour stopwatch.5 workout memory with 50 laps per workout.24 hour countdown timer.Interval repetition counter.3 customizable alarms with 5 minute backup.2 time zones for travel convenience.replaceable strap.100M water resistance.Indiglo Night-light with Night-Mode feature.