Timex Ironman 30-Lap Shock Resistant Combo Watch Indiglo night-light Designed to Shock-Resistant I.S.O. standards providing ultimate dependability and ruggedness. 100-Hour Chronograph with Lap and Split Times, 99-Lap Counter 30-lap memory recall for effortless review after workout Water resistant to 660 feet (200 M): suitable for recreational scuba diving