Princess and the Popstar Microphone works alone or with any MP3 Player via the headphone jack. Cord stores inside mic body when not in use. Microphone has flashing lights when in use. Toys'R'Us recognizes that at any given moment in history, Barbie® is a reflection of the times and always culturally relevant. Barbie® is the world's only brand that allows girls to imagine themselves as a mermaid to a movie star, a fairy to a fashionista, and a princess to a president. With various doll styles, accessories, playsets, along with role play costumes and collectibles, Barbie® is on-trend without being trendy, classic without being outdated! The Barbie® brand serves a purpose to girls as they try on different personalities, careers, and explore the world and all of its possibilities without ever having to leave home! Although the Barbie® brand roots are as a fashion doll, it has grown into a fashion and lifestyle brand, spanning numerous product categories...all available right here at Toys R Us!