The cat ball toy has a built-in motion sensor that activates whenever your cat touches it, causing it to spin and move unpredictably. This mimics the movement of prey, keeping your cat focused and stimulated. There is also a scratching pad on the outside of the toy ball, which will help satisfy your cat's natural urge to scratch, thereby saving your furniture from damage. Name: smart ball cat toy Material: ABS, silicone Specification: Diameter 43mmweight：40g Battery capacity: 80mAh Packing content: smart ball cat toy *1, Charging cable *1