The Timex Ironman Solar Shock watch delivers all the classic features of the superb Ironman series and a solar-charged battery Unique design features an easy-to-use, push-button format. Features 50-lap/split time memory recall, 100-hr. chronograph with lap or split option and 99 interval repetition counter. Total Run chronograph format excludes rest periods for accurate times on long runs or bike rides. 24-hr. countdown timer includes countdown stop and countdown repeat functions. Features 3 programmable audible alarms with 5 min. back-up alarm and on/off hourly chime. INDIGLO night-light illuminates the display for easy use at night. Linked timers for speed workouts and walk/run marathons walk 1 min./run 8 min.. Tough stainless-steel caseback and top ring are water resistant to 200m 656 ft.. Polyurethane strap offers enhanced ventilation and flexibility for a seamless fit. Overstock.