This smart rolling USB cat toy is awesome! It has a very clever design and rolls very smoothly, which attracts my cats to keep chasing and increases their exercise. Most importantly, it uses environmentally friendly materials, conforms to the concept of sustainable development, and is also safe to use. It is easy to charge and durable, and cats have a lot of fun playing with it! It is very suitable for cat owners who want to keep their pets active. Highly recommended!