The Gear Cube is a novel new design from Meffert’s.
With a full gear mechanism each complete rotation requires twelve 90 degree turns.
Once you’ve mixed this up there are several challenges you can attempt. First simply try and get it back into a cubic shape. After that you can try and get it to the state where each face has only two colours. If you manage that then solving it to each face being a seperate colour is the final challenge.