Durable, Thickened & Safe Materials: Moving dog toy is made of high-strength TPU & PC material, it is bite-resistant and wear-resistant,and the 10 mm thick shell can withstand enthusiastic chewing. The vibrating dog ball for large dogs has a textured surface that helps dogs clean their teeth and prevent oral diseases 4 Selectable Modes: You can easily switch modes (Gentle, Normal, Active, lighting ) of indestructible dog toy to match your dog's play style and energy level. (Each time you press the button to switch modes, you need to wait 10 seconds for it to enter working mode.) Super High Bounce: Interactive rolling ball dog toy made of high elastic material, this ultra-bouncy ball outperforms standard vibrating ball for dogs. The moving dog ball a ideal dog toys to keep them busy, and suitable for marble, wood, and tile floors,, lawns and outdoor areas Ultra-long Standby: The bouncing ball for dogs is equipped with an enhanced motor and takes 1.5 hours to fully charge, providing 4 hours of continuous play. Rechargeable for Prolong Play: Notice: cognitive dog toys will automatically stop moving after 2 minutes and 40 seconds to enter standby mode under smart mode, need touch to get the interactive dog toys re-activate With a 2.56-inch diameter, the pet toy ball is perfect for dogs weighing 40 lbs or less. We recommend that pet owners supervise their dogs when they play and teach them how to interact with balls correctly, rather than just biting the ball. This will also help strengthen the emotional bond between you and your beloved dog.