Well, the RF pack is for people who own TVs with no RCA video hookup or S-Video hookup. I believe there are to other packs, the Advanced pack and the High-definition pack. The first one has S-Video and Dolby Digital hookup, while the second one also has Dolby Digital and the connections necessary for high-definition tv's. At least that is what I understand. However, I have seen other companies already releasing their versions of these packs for about $5-10 less than Microsoft's, so you may want to look at those instead.