Features:How Work:When kids sing or talk into the mic as closely as possible, the coiled spring inside the microphone will reverberate the voice of child and create an extended voice.No Noise:No battery means no noise, no trouble but always fun! The vibration of coiled spring naturally create voice, like an "always-on" speaker.Echo-Toy:Kids love it and never get tired! This adorable mic creates an echo-sound and provides children hours of real fun without excessive loudness.Gift:Professionals suggest this kind dramatic toy is highly beneficial in kids' listening and language acquisition. A great gift for your own or family and friends.Service:If you have any problem about it,welcome to contact our to provide service.Notice:1.Actualcolor may be slightly different from the image due to different lighteffect2.Pleaseallow 1-3cm deviation due to manual measurementDescription:Material:PlasticSize:9*24cm