On the rear panel is a large, proprietary audio/video output, which connects via a thick cable that terminates as both component video and composite video with analog stereo: Just flick the TV/HDTV switch at the plug to choose between the two. Component video output offers resolutions of 480p, 720p, and 1080i. Presently, the Xbox 360 supports neither DVI nor HDMI connections. Also located at the cable's plug is a digital optical audio output. The audio profferings are analog, Dolby Pro Logic II, and Dolby Digital 5.1. One USB 2.0 port is located at the rear, ostensibly for the wireless network adapter, sold separately, and two more up front, behind a vertical door to keep them clean and out of sight when not in use. The USB connections are a common standard by which just about any portable music player or digital still camera can be patched directly in to share its content.