Bluewater Quartz Time & Tide Clock, Dial: 3.75", Overall Diameter: 5.5", Depth: 2.875", 11 oz

Combination quartz and tide clock movement which averages the lunar tide cycle. The tide sector is calibrated for the east coast of the United States. Uses a AA battery. (Note: The clock will work for other tidal bodies of water but will need to be re-set