Composition : 100%PlasticFuture tide function,EL backlight,500 preprogrammed global tide locations,Versatile graph and detailed tide displays,Set spot X averaging tide for 1000’s of tide locations,Heat countdown timer with 5 minute and 1 minute warnings,Day, date, calendar, alarm and stopwatchRead more Water Rating100m/330ft waterproof tested Watch TypeDigital Tide WatchTide Watch CaseABS Hardened Plastic MovementDigital tide Watch BandRubber Case Size39mm SKUA1139G Shipping & Returns Next Tide Watch