Oregon Scientific SW202 Swimming Watch, Black by Oregon Scientific. $36.72. Time your laps as you swim!This swimming watch keeps track of your time when performing laps in the pool. The Auto Lap and Stroke Counter features support each of the main swimming strokes; Freestyle, Backstroke, Breaststroke, and Butterfly. Workout memory function stores data from your last 7 exercise sessions. It will even measure your calories burned and features a clock with stopwatch and alarms.