The musical toothbrush features sound technology that sends sound vibrations from the bristles through one’s teeth, so that the music is audible and clear. Simply press the button, wait for the beep and then brush away. To increase the volume, simply increase brushing pressure. The soft-bristled brush plays two full minutes of the song “All For One” sung by the cast of the movie, “High School Musical 2.” Another “High School Musical 2” toothbrush with the song “What Time Is It” is also available, as are Hannah Montana and Cheetah Girls versions. Batteries are built in.