Sing along and have fun: the eKids L.O.L. Surprise! Karaoke Boombox inspires all fans in the children's room. The audio input allows MP3 players and smartphones to be connected to the boombox to play your own music. The built-in microphone can be switched on to music at the touch of a button or can be used without music. Thanks to the pre-installed songs, the music fun can start right away. 2 AA batteries are required to operate the karaoke box. These are included for test purposes with partial charge.