When dog chew the duck toys, it will vocalize due to it has the sounder insideSize: 23cmMaterial: plushToy sound and shake amplitude can make pets more fully enjoy the fun of toys, to relieve the dog's loneliness and anxietyLovely duck animal shaped and bright color toys design will attract your puppy to play with itNote：All dimensions are measured manually with deviation （ranged）at 1-2mm. If by any chance they are not, we are sorry for that.The pictures of the products on our website are taken from the actual products themselves, the colors and materials may look different due to different screens and sunlight.