Compact Rechargeable: Portable design with easy USB recharging, making it convenient to use anytime, anywhere. Tail Design: The attached tail mimics prey, adding an extra element of fun for your pet to grab and play with. Bite Resistance and Durability: Soft and skin-friendly silicone wrap, quietly rolls, increases friction, and offers bite resistance and durability. Sturdy Construction: Made from premium, pet-safe materials designed to withstand playful paws. Physical and Mental Stimulation: Encourages your cat's natural hunting instincts and provides both physical exercise and mental stimulation, helping reduce boredom and destructive behavior. Note: 1. Actual color may be slightly different from the image due to different lighting conditions. 2. Please allow 1-3 cm deviation due to manual measurement. Size: 55 mm Battery: 150 mAh Package List: 1 x Ball