With nine control pins and a 4x4 grid of clock faces, the C4U 4x4 Clock (Stickerless) is an imaginative take on the traditional clock puzzle. Because each pin affects the four clocks around it, the puzzle is intricately linked and difficult to solve. This unusual puzzle has a visually striking flare because to the gentle lavender hue on one side and the blue tint on the other. It's ideal for puzzle fans wishing to venture outside of the conventional clock format because of its intricate mechanics and novel approach to solve it.