True 3ATM Water Resistant Construction-use with confidence in any weather. 1/100 second resolution; 24-hour timing range; 2 Memory recall of finish times. A pull tab to prolong life and a Battery Hatch makes battery replacement a breeze. Use as a Single Event Stopwatch or take UnlimitedMultipleSplitTimes.Time, Alarm, Calendar. One Year Factory Warranty. Include a Break-away safety lanyard which helps prevent accidents and promote safe use.