The ball of interactive cat toys rolls better on hard floor, but may not roll well on thick carpet, please purchase it carefully. Please do not play in the stairwell to avoid damage. The cat toys ball can be switched between red light and colored lights, which can quickly attract kittens’ attention and enjoy the fun. Rechargeable: No need to replace batteries again and again, just plug in the cable for 1.5 hours, provides your cat with up to 4 hours of fun. The main purpose of the interactive ball auto-rotating for cat is to allow your pet to chase the ball and have fun. With just a press of a button, the ball will begin to rotate 360 degrees automatically and attract your pet’s attention. The ball will continuously move through your home while producing red/colorful light. Due to the sphere shape and self-balancing system, the ball automatically changes direction when it collides with a wall, chair, door, etc. No extra help is required, all you have to do is turn the ball on to play