This merry microphone has six Christmas songs built right in ... for fa-la-la-la-fun wherever you go! Just press the Christmas carol karaoke button and sing to the music (includes lyric book). Also works as kids microphone toy alone, without music. Our kids karaoke microphone uses 4 AA batteries (batteries not included). Ages 3 and up. Plastic, metal. 8" long x 2 1/2" wide x 2 1/4" deep.