18 Note Windup Music Box Baby Mobile Crib Rotation Bed Bell Kids Toys Music Box Musical Movement HIGH QUALITY: ABS And metal music box inside. HOW TO USE: The sound power from Spring,use the key to turn the Spring tightly,then release and will be playing. NEW DESIGN: Hook Rotates while playing music,you can pause while playing NOTICE: The music movement just play a part of song ,not play the whole song. WARRANTY: Limited One Year Warranty.