The Robic SC-539 offers superior quality and features not found on any other entry level stopwatch: A pull tab to prolong life and a Battery Hatch makes battery replacement a breeze.True 3ATM Water Resistant Construction-use it with confidence in any weather.Jumbo sized LCD display with very large Digits make results easy to read.Oversized pushbuttons with professional quality snap action for accuracy.Use as a Single Event Stopwatch or take Unlimited Multiple Split Times1/100 second resolution; 24-hour timing range; 2 Memory recall of finish times.Simple operation for Volunteers; Unmatched quality for Coaches, Trainers and Professionals