Buttons 1-5: sing a to o (vowels)
Button 6: vibrato
Button 7: shift
Button 8: volume up
Button 9: volume down
Button 7+1-5: choose preset lyrics
Button 7+6: Do-re-mi mode (sing the scale)
Button 7+8: octave up
Button 7+9: octave down
It is required three AAA batteries (not included) and comes with USB port.
*Check on Youtube more details!
