Audiovox CNP2000 XM Mini Tuner Cartridge Cartridge contains everything needed to deliver XM satellite radio to any compatible XM-ready audio player Works with a wide variety of products, including home theater and stereo systems, DVD players, mini and micro shelf systems Can be inserted directly into an XM-ready audio device with a suitable port Allows you to have just one XM subscription that you can take with you to deliver XM satellite radio virtually anywhere you go Compact unit has an entire XM radio tuner built in, yet measures only 1.3 x 1.65 x 0.44 inches (W x H x D)