Tidetime Nautical Tide Clock- Windsurfer Face PLEASE NOTE: DELIVERY WITHIN 5-6 DAYS FUN, CONTEMPORY AND ATTRACTIVE - INDISPENSABLE FOR COASTAL LIVING AUTOMATICALLY KEEPS TRACK OF THE TIDES - IN EXACT STEP WITH THE MOON TAKES 1 x AA BATTERY - WALL MOUNTABLE - 20cm DIAMETER - US MECHANISM INDISPENSABLE FOR COASTAL LIVING