Material: [Housing] stainless steel, hardened crystal; [Band] polyurathaneChronograph: NoWaterproof: Yes Backlight: No Alarms: NoSize: Extra LargeWeight: Not Specified Recommended Use: Casual, water sportsManufacturer Warranty: 2 Year limited Nixon designed the 51-30 PU Watch for real watermenthose individuals whose life follows the rhythm of tides more than the ticking of a clock. Set this premium timepiece's tide subdial and you'll always know when to hit your favorite point break.