These Nautical gifts are perfect for all mariners and boaters! Features: Corrosion-resistant ABS housing Scratch-resistant acrylic lens Easy access hinged front bezel Dial diameter: 4" Weight: 10 oz. Mounting flange diameter: 6" Mounting hardware included Red hand indicates tide condition One "AA" battery required (High quality Alkaline battery recommended for best performance) One year manufacturers warranty Product Code: CC-W-02 Time & Tide Clock Instructions