FeaturesCompact Rechargeable: Portable design with easy USB recharging, making it convenient to use anytime, anywhere.Tail Design: The attached tail mimics prey, adding an extra elements of fun for your pet to grab and play with.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.Sturdy Construction: Made from premium, pet-safe materials designed to withstand playful paws.Physical Mental Stimulations: Encourage your cat's natural hunting-instincts and provide both physical exercise and mental stimulations, reducing boredom and destructive behavior.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Size: 55mmBattery: 150mahPackage List:1x Ball