If you need an affordable time and tide clock that can withstand the outdoor elements, the Blue Water Time and Tide Clock is the answer. Housed in a black, splash-resistant resin case, this rugged quartz clock accurately displays both time and tide. The red hand points to the rising or falling tide. The time is indicated with black hour, minute, and second hands. Battery-operated quartz movement Tide sector averages the lunar tide cycle for the Atlantic Ocean Note: Tide calibration for other tidal bodies of water will need to be reset frequently, e.g., Pacific Ocean & Gulf of Mexico Precision molded, high-impact black resin construction O-ring seal for splash resistance Requires little maintenance Scratch & glare resistant matte-finish bezel Scratch-resistant glass crystal Hinged bezel with knurled brass locking lug for easy access to movement & battery Secure battery clip for open ocean security Battery, instructions & mounting hardware included Lifetime warranty