Not only a toy,but also a companion: Great toy and companion for your pets,when you are not at home, or out to work. When you leaves, you can also let the ball jump, roll and move, so that she is happy all day when we leave, it is safe for you and your pet. Unique Rolling Design with Built-in Gravity Sensor: Design with 360 degree automatically rolling by gravity sensor.In order to avoid balls rolling during transit,there is one internal switch,which controls rolling by gravity sensor,once this switch is turned on,the ball will be rolling randomly for 30 min,and 15 min for rest.if this ball will be touched by you or your pets again,it will roll randomly again. Long-lasting & Rechargeable & Waterproof& RGB lights: Designed with a hidden & inside USB charge, which is much more convenient and long-lasting than batteries.The toy ball is waterproof. Easy for you to wash the ball,and keep the ball & your pets clean. Indoor & Outdoor Play:Suitable for all indoor play,even work on carpet or rug. As our interactive ball is waterproof,you can also play it with your pet at the sand beach, grass lawn, a swimming pool etc.Your pets will be enjoying much fun and entertainment with our ball designed with 360 degrees automatical rolling. USB Charging: Rechargeable and charging takes about 1 hour, and the game can last up to 5 hours. Compatible with the universal smart phone 5V charger for charging. There is a charging indicator light when charging. When fully charged, the light turns blue. Package included: 1 x Ball