SIRIUS Sportster 4 Satellite Radio Receiver with Car Kit Sports-specific, plug-and-play Sirius satellite radio receiver with bundled car kit Decodes digital-quality signals for more than 120 music, news, and sports channels Game Alert feature prompts you when favorite sports team is playing on Sirius Instant replay function lets you pause, rewind, and replay 44 minutes of live radio Measures 4.5 x 2.9 x 0.6 inches (W x H x D); 1-year warranty