Dual Split 50 Memory AX Pro Stopwatch with Backlight

50 memory dual split. AOS features anytime memory review, one button rapid split action. "Twin button" system. Accurate to 1 second per 15 minutes of elapsed time. "X" case features million-cycle, no fail switches for reliable timing. Water resistant to 100 ft., shock resistant. Backlight feature. New 5 year lithium battery.