Product Description: Material:ABS The ball diameter:4.8cm/1.89" Product features 1, 3 minutes automatic standby, cute claws touch games continue 2, drilling into the bottom of the bed can also come out and automatically avoid obstacles. 3, loop charging, USB charging happy fitness, not stop, colorful LED colorful light 4, tailor-made fitness plan, smart escape route, with the master to come at home, a marathon off-road Package Include: 1 x Pets toy Notes: 1. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors. 2. Due to the screen difference, the color may be a little different from what you expect, please allow it. 3. 1.00cm=0.39" 1, 3 minutes automatic standby, cute claws touch games continue 2, drilling into the bottom of the bed can also come out and automatically avoid obstacles. 3, loop charging, USB charging happy fitness, not stop, colorful LED colorful light 4, tailor-made fitness plan, smart escape route, with the master to come at home, a marathon off-road 5【USB rechargeable】Upgrade to rechargeable battery inside by USB charging cable as accessory. No need paid extra money to buy battery.