Features: Rolling Ball: The interactive dog ball is the ultimate entertainment for your furry friend. Just press the button and this interactive rolling ball will start to spin, move and shake, attracting your dog to chase and catch it. High quality materials: The outer shell of the rolling ball dog toy is made of environmentally friendly, impact resistant silicone material, which is soft and skin friendly. The rolling friction is strong and quiet, and it will not be damaged by walls or dogs and cats. Dog Activity Rolling Ball: The electric rolling ball dog toy has a built in intelligent motion sensor and automatic obstacle avoidance system. When the dog ball encounters an obstacle or a narrow place, it will reverse and move away by itself. So there is no need to worry about the interactive dog ball getting stuck in the corner. Rolling Quietly: It is very quiet, which is really important, giving cats a night of curiosity and giving you a quiet sleep. Rolling quietly, day and night, play whenever you want. Three Modes Smart Cat Toy Ball: The interactive cat ball toy has three built in modes: fast mode, slow mode, and interactive mode. Package Included: 1 x Interactive Rolling Dog Ball Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1 3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)