RECHARGEABLE BATTERY TOY - Built-in battery, USB recharged batteries for up to 2 hours play time for your cat. ENERGY SAVING SYSTEM - In order to save energy, the toy will stop working automatically in 15 minutes. The toy can roll unevenly and change direction on its own when it meets resistance. ATTRACTIVE LIGHT - The light on the ball will attract cats chasing swating and running. This interactive ball attracts your pet’sAttention with a 360 degree rotation and simultaneously emits a red light. EXERCISE MORE - Your cats will no longer be bored if they have fun with them, entertain them and relieve stress when you leave them alone at home. ECO-FRIENDLY AND SAFE FOR PETS - All accessories are integrated into a roller ball. The red LED light is soft enough not to damage your pet’s eyes. The surface is in ecological ABS. Product description Why choose toy balls for cats? Upgraded version with USB charging, charging time 1.5 hours, provides 4 hours of fun. Automatically turn off every 15