With this app, you can control all the major functions of the powerful KOD-2000/3000/4000 karaoke jukebox. This app allows you to search and play the songs on the hard drives of your KOD-2000/3000/4000, browse by category, build your custom playlist, adjust music and microphone volumes, adjust the key, and pick your favorite songs. This app automatically syncs to your KOD-2000/3000/4000 via a wi-fi.