Variable Color Display: The display backlight illumination can be adjusted to any of the following colors: light blue, blue, white (has a bluish tint), green, yellow green, red, or purple.
MP3 Playback: This unit can play MP3 files recorded on CD-ROM, CD-R, and CD-RW discs in ISO9660 Level 1/Level 2, Joliet, and Romeo formats. Each disc should have a maximum of 150 folders and 300 files/folders. During MP3 playback, the unit displays any recorded ID3 Tag information.
Aux Lite Auxiliary Input: The CDX-F5705X has an auxiliary input on the rear panel, allowing you to connect a separate audio source, such as a portable MiniDisc or MP3 player, or the audio output from a mobile/portable DVD player. In the past, Sony receivers required a separate adapter, however, this unit'* "Aux Lite" input allows you to directly connect the auxiliary unit to the receiver'* stereo RCA input jacks.