Features_x000D_Motion Sensor Activations: The toy activates with a simple touch, encouraging your cat's natural huntings instincts, and then intelligently choose the routes to avoid_x000D_Tail Design: The attached tail mimics prey, adding an extra elements of fun for your pet to grab and play with._x000D_Bite resistance and durability: Soft and skin friendly silicone wrap, in addition to rolling quietly, increases friction, and takes into account bite resistance and durability._x000D_Sturdy Construction: Made from premium, pet-safe materials designed to withstand playful paws._x000D_Physical Mental Stimulations: Encourage your cat's natural hunting-instincts and provide both physical exercise and mental stimulations, reducing boredom and destructive behavior._x000D_Notice:_x000D_1.Actual color may be slightly different from the image due to different light effect_x000D_2.Please allow 1-3cm deviation due to manual measurement_x000D_Description:_x000D_Size: 55*45*48mm_x000D_Battery: 150mah_x000D__x000D_Package List:_x000D_1xInteractive Cat Toys Balls_x000D__x000D_