This cordless rope skipping solves the storage problem of the rope. When people use it, they can store it only by pulling and hanging. At the same time, the expansion and length of the control rope is fixed through the fastener at the bottom of it. In the design of rope skipping ball, the shape of cat's head is selected. When using it to jump rope, it is like a cat jumping. In terms of material selection, silicone and high-grade plastic are mainly used to make enough friction when grasping. At the same time, we named it 'catsset', on the one hand because of the word 'Casset', on the other hand because of its cat shape, which is interesting.