Replaceable parts: the plush ball on the top of the toy is removable and replaceable, so you don't have to worry about long-term interaction breaking this part of the toy and making it unusable.About this itemelectronic cat toy Replaceable power supply: The product only needs two AAA batteries to work. You can install and replace the battery by simply unscrewing the top and bottom parts of the product. It is very convenient. Of course, our product does not contain batteries when we buy it, need Your own preparation, if you encounter any other problems in the process of using, welcome to contact us at any time;pet toy shell shape design: round egg- shape design, no sharp edges and corners, will not damage your furniture or hurt your cat, at the same time can 360 degrees free rotation, very flexible, can exercise your reaction;containEasy to interact with cat toys: Press the power - to activate the toy, the eggshell will swing automatically when your cat is near, the wobbly ball of - will trigger its hunting nature, it will be happy to interact with this toy1PC Cat Teaser stick toy interactive cat toy material: the main use of environmentally ABS material, five tasteless, will not bring any impact on your pet and family's health, your cat can enjoy the play pet