The Winki was specifically created for the female athlete and is our most petite tide/sport watch. It uses a 35mm lightweight & high-impact ABS plastic case and PU strap, so you'll never have to worry about being too delicate with it when making the transition from the surf to the sand. It also includes pre-programmed tide charts for over 200 preset beach locations world-wide, displays tide height & range, and up to 10 years of future tide chart information. Other features include a dual-time display, moon-phases, countdown timer, stopwatch, alarm, and back light. The Winki is water resistant to 100 meters (330 feet) and backed with a 5 year limited warranty.