Sirius S50 Portable Satellite Radio Receiver with Car Pack Portable Sirius satellite radio receiver with belt clip, ear buds, and car kit 1 GB flash memory saves up to 50 hours of Sirius programming or other digital content Supports MP3 and WMA files; built-in FM transmitter for plug-and-play use in car Voice-assisted channel navigation announces the channel; USB interface for PC transfers 176 x 220 TFT color display; measures 1.9 x 3.8 x 0.67 inches (W x H x D); 1-year warranty