Features:1. The mop ball cover is made of microfiber material, very soft and never scratch your floors, easily clean dust and dirt, also easy to clean.2. With the zipper design on the ball cover, very convenient to take off and wash.3. Just take off the ball cover and press the button, the automatic rolling ball could absorbed the dust on the floor firmly by rolling process.4. Four bright color and cute ball appearance, it's a perfect plush toy for your pets.5. You don't need to kneel on the floor to clean any more, this is a good housework helper for you.Specification:Condition: 100% Brand NewMain Material: Fiber + PlasticBall Color: BlackCover Color: Yellow, Green, Blue, Rose RedPower Supply: 1 x AA Battery(Not Included)Diameter: Approx. 8 cm / 3.15 inchWeight: Approx. 226gPackage Included:1 x Robotic Cleaning Ball(Not Included Battery)4 x CoversNote:Please allow slight deviation for the color and measurement. Thanks for your understanding.