The Accusplit Pro Survivor A601X Stopwatch features magnum XL display lights as well as waterand shock-resistance. This stopwatch also features no-fail switches for reliable timing. How It Works 1-2 fast finish. Start/stop. Time out/time in. 40 min to 1/100 sec. Cumulative Split only. 12/24hr option. Alarm memo with no sound. Technologies Split/Release Action. No-fail switches. Water Resistant: Up to 30ft. Extra-Shock Resistant. Design Details Month, date, and day of week displayed. Operating System: WOS 2.5. LC Display: Magnum XL. What's Included Accusplit Pro Survivor A601X Stopwatch. CR2032 Battery. 5-Year Limited Warranty.