SportCount LapCounter RELAX and enjoy your workout more without worrying about what lap you are on. COUNT up to 9,999 laps: If you are swimming more than that, you are swimming too much! ONE HAND OPERATION means that you can track your laps easily without interfering with the natural flow of exercise. ADUSTABLE STRAP fits all sizes comfortably and securely. WATERPROOF, lightweight, and durable -- warranted for a full year when purchased from an authorized Amazon dealer.