Freestyle Unisex 10022919 Mariner Tide Digital Display Japanese Quartz Black Watch 45mm Case Diameter Japanese quartz digital tide movement, providing a valuable asset to the boating/sailing/fishing/diving communicates worldwide with: customizable alarms, sunrise / sunset and tide information for 150 beaches worldwide, dual time, countdown timer/stopwatch, standard digital functions and backlight, polycarbonate case with hyrdro-pushers (able to be pushed under-water), comfortable and durable canvas synthetic strap Japanese-quartz movement Water resistant to 330 feet