Tide clock: the analog wall clock shows the time period until the next ebb or flow, easy to read Design: modern, maritime design in blue tones with high-quality stainless steel frame and glass cover Tidal rhythm: every 12 hours and 25 minutes, the dial is circumnavigated; at 12 o'clock the tide clock shows the highest water level (high tide) and at 6 o'clock the lowest (low tide) GIFT:Ideal for people with affinity for the sea such as anglers, sailors, surfers, swimmers or watt hikers Box contents: the tide clock and the instruction manual are included, the battery (1 x 1.5 V AA) must be ordered separately