(1) How to use the running ball: a. Put the SS into the running ball on a flat floor indoors and outdoors, cover it, and place it on the ground for use. Make sure the SS is within the line of sight of the owner.b. If the pet can't run for the first time, it is recommended that you don't need to worry. You can leave the SS in the running ball for 1-2 hours to familiarize the SS, remember not to force it, or it will increase the sense of fear. After being familiar with toys, SS will gradually learn to avoid obstacles when running on flat ground. (2) The installation method of the cover at both ends of the running ball: the cover adopts a concealed buckle design. When installing, the buckle position of the cover should be aligned with the corresponding position of the running ball. At the same time, the cover needs to be twisted until the end is screwed.Let the hamster run anytime, anywhere12cm in diameter