Smart Cat Toys Automatic Rolling Ball Electric Cat Toys Interactive For Cats Training Self-moving Kitten Toys Pet Accessories Description: Material: ABS/Silicone Size: 43mm in diameter Weight: 40g Battery capacity: 80mAh Color: pink, blue Specifications: 43mm sizeDifferent from the traditional rolling ball size on the market, it is more suitable for cats to have a "sense of control" for primitive hunting Intelligent Obstacle Avoidance with Bionic MotionWake up by tapping in intelligent mode, simulate the rolling of the escape trajectory of the prey, and intelligently select the route to avoid after hitting the obstacle Quiet and no noise 90% of the outer layer is wrapped with cache material, and the scrolling is quiet High-quality material Soft and skin-friendly silicone wrap, in addition to quiet rolling, increase friction, and take into account the bite resistance and durability.