Turn your iPod into a Karaoke machine

From the site :

Turn your iPod into your own band. Play backing tracks or songs and sing along. We add an echo effect to your voice to make it sound like you are on stage! Includes a high-quality microphone, cables, AC adapter, and microphone stand clamp. We even include an electric guitar input--the MusicJam has a guitar preamp with Tone and Distortion controls. The MusicJam has a sophisticated circuit design with very low noise and superior sound quality that may be used for public performances and recording via standard RCA jacks on the side.