This CD player/receiver is packed with powerful sound features, including 3-Band Sound Quality , a MOS-FET high-power 50W amp and Re-Master. In order to achieve a high compression ratio, some of the less audible high-frequency tone data gets filtered out during the creation of AAC, WMA, MP3 and other compressed file formats. To compensate, the Re-Master function interpolates the treble data for richer audio reproduction during playback. This expansion module-ready player/receiver gives you the option of extending your digital lifestyle into your vehicle with an expansion module designed specifically to link car audio equipment with a variety of digital devices. Plug in your iPod, camcorder, video game system, satellite radio receiver, DVD/CD changer, or Bluetooth Hands-Free Mobile Phone Kit — all at the same time! Each of minimize