USB Rechargeable Design: This cat bird toy uses a rechargeable design, which saves you from the hassle and costs to replace batteries. Using an eco-friendly,safe and durable Built-in battery movement , it provides a consistently enjoyable play experience for your beloved pet.The chargeable mechanism is detachable.USB cable is included in the package. Washable&Durable Cover:The cover of squeak cat toys is made of soft plush,which is machine washable. Whenever you find it's dirty,after cleaning it, it will look . Enjoy hassle-free cleaning while ensuring long-lasting entertainment for your fur kids.Note: the mechanism is not waterproof, be sure to remove it before washing the cover. Replaceable Catnips Bag:This catnip toy will awaken your cat's playful instincts and relieve the stress and boredom of cats. The cute cat toy comes with a refillable pocket, so you can always replace the catnip if you want to.Note: When replacing the catnip, please don't put in loose catnip to avoid damaging the mechanism. Please put in catnip tea bag. Interactive Cat Toys:Whenever your fur kids touches this electronic cat toys, the built-in automatic motion sensor will be activated, and the dancing bird toys will flap its wings and continuously bringing freshness to your kitten.Cat Kicker Toys have 3 mode realistic swinging wings ,universal for all ages. Simulated Bird Singing Sounds:With Bird Melody,the Lifelike Chirping Cat Toys will awaken the hunting instinct of cats. It can keep your cat engaged, entertained, and never bored again.Perfect Birthday,Christmas and New Year gift for pets.