I will show you what is ‘‘Voice-over’’. Voice-over is a production technique where a non-diegetic voice is used in a radio, television, film, theater, or other presentation. The voice-over may be spoken by someone who appears elsewhere in the production or by a specialist voice actor. Recently, iPod take in this Voice-over system. It reads out title of music or artist, and can speak more than 20 languages. Voice-over is also useful for field of welfare. Blind people can understand by reading out documents. I will expect voice-over is more promotion.