On-Key Karaoke Player Professional System (Discontinued by Manufacturer) Includes 200 songs, Deluxe Carry Case, AC Adapter, USB Cord, &amp; Song Book Internet enabled for additional song downloads. Holds up to 400 songs in the player. Pro quality microphone element and acoustics Next generation Voice Transformation effects &amp; Vocal effects including harmony &amp; studio doubling State of the art music synthesis, echo &amp; reverb