Product highlights: The ultimate HD cable DVR. Works with digital and analog cable; digital and analog antenna. Satellite NOT supported. Replace your cable box using one or more CableCard™ decoders available from your cable company. Control cable TV with pause, rewind, fast-forward, and slow-motion. Save up to 20 hours of HD programming (or 180 hours of SD) at a time. Record two shows at once in HD.* Increase your recording capacity with the My DVR Expander. Digital Transition ready. Product specifications Save up to 20 hours of HD programming (or 180 hours of standard definition) at one time TV signal sources: digital and analog cable, digital and analog antenna. Satellite NOT supported. Replaces your cable box using one or more CabeCARD™ decoders available from your cable company Video output modes: 480i, 480p, 720p, 1080i, native, hybrid TiVo Series3™ architecture Product dimensions 16.5" W x 12.625" D x 3.375" H Weight: 9 lbs Phone line: Connects to an existing home phone line, unless you connect an Ethernet cable to (G) or the TiVo wireless adapter to (H). Digital audio: Connects to your home theater system for digital sound using an optical digital audio cable. (Sold separately) S-Video out: Connects to a TV for a high-quality standard definition picture. It does not support high definition. Requires connecting a separate cable for audio. Component video out: Connects to a TV for a high definition picture. Requires connecting a separate cable for audio. Composite video and stereo out: Connects to a TV for a standard definition picture. Use only the white and red cables if all you need is audio for a different video source, like S-Video or Component video. HDMI out: Connects to a TV, A/V receiver, or home theater system for a pure digital connection that provides HD video and digital audio all in one cable. Ethernet: Connects to an Ethernet cable to allow your DVR to access your home network and your broadband Internet connection. 2 USB ports: Connects to the TiVo wireless adapter if you want to wirelessly connect to your home network and broadband internet connection. E-SATA: Connects to the My DVR Expander to increase recording capacity. Cable In: Connects to the coaxial cable in your wall that provides your cable TV programming. Satellite is not supported. Antenna in: Connects to the coaxial cable from a TV antenna in order to receive analog and digital broadcasts (including HD programming) over the air.