ShengShou Clock 4 M

This clock is an interesting puzzle where the task is to move the clock so that the watches point at 12. There are nine clocks on each side. The clocks can be adjusted with four wheels located on the edges of the puzzle. There are four buttons in the middle of the puzzle that allow you to control which clocks are currently being moved by the wheels on the side. In any case, this is a very cool mystery, which is also used in cubing competitions.