Made of premium ABS material with soft and skin-friendly silicone wrap, in addition to rolling quietly, increases friction and takes into account bite resistance and durability 43mm is under claw control. Different from the traditional rolling ball size in the market, it is more suitable for cats to have a sense of control over "primitive hunting" In intelligent mode, you can wake up by patting, simulate the escape trajectory of prey, roll and hit obstacles, and then intelligently choose the route to avoid Built-in lithium battery and it can be charged by Type-C cable, your kitty will enjoy several hours of fun time Specifications: Indicator light: red light flashing: the battery is too low and needs to be charged, blue light flashing: charging, green light steady: charging completed (please fully charge for first time use) Material: ABS/silica gel Size: diameter 43mm Weight: 40g Implementation standard: Q/PG041-202 Battery capacity: 150mAh Package included: 1 x Automatic Rolling Electric Cat Ball 1 x Type-C Cable