USB Rechargeable Version 2019You dont have to keep replacing the batteries. Just plug in the cable for 1.5 hours and your cat will have up to 4 hours of fun. After the ball has been rolling for 15 minutes, it will automatically turn off, no need to manually press the pause to avoid wasting energy. 360 Degree Self-RotationThe main purpose of the self-rotating ball is for your pet to chase the ball around and have fun. With just a push of a button, the ball rotates 360 degrees and attracts your pets attention. The ball moves continuously around your house and at the same time creates a red light. Automatic Change of DirectionBecause of the spherical shape and self-balancing system, the ball will automatically change direction when it collides with a wall, chair, door, etc. No additional help is required. You just need to turn the ball on to play and turn it off when your pet runs out of energy and is done playing. Environmental protection and safety material: Cat toy ball is made of environmentally friendly ABS material, safe and non-toxic, anti-grab and anti-bite. And the LED light on the ball will not hurt the pets eyes. With a diameter of 6.2 cm, this toy is suitable for small and medium-sized pets. Caution The ball rolls best on hard ground, may not roll well on thick carpets, please buy with attention.