Features: 1.Automatic Induction Technology: This smart self-moving dog ball features automatic induction to detect and avoid obstacles, providing a seamless rolling experience for dogs to chase indoors and outdoors on various surfaces like lawn, marble, and carpet. 2.Chew Proof & Durable Design: Built with a tough, knot-textured exterior, this interactive puppy toy ball is engineered to withstand aggressive chewers while promoting dental health through teeth grinding and cleaning during play. 3.Detachable Casing For Easy Cleaning: Designed with a removable and washable casing, this ball allows quick disassembly for hassle-free cleaning, ensuring hygiene after outdoor or indoor play sessions on dirty or dusty surfaces. 4.Irregular Movement & Random Rolling: Equipped with a full-range rolling mechanism, the ball moves in unpredictable patterns and irregular states to mimic prey-like motion, keeping dogs engaged and active during chase games. 5.Built-In Barking Sound Stimulation: The ball integrates constant barking sounds to spark curiosity and natural instincts in dogs, enhancing interactive play for high-energy pets while encouraging physical exercise. Specifications: Product Material: Abs/Tpr Product Colors: Blue, Red Battery Capacity: 200Mah Product Size: 81 * 68mm Charging Interface: Type-C Include: 1 * Ball 1 * Charging Cable