Product Code: SUBX1 Price: Check Latest Directed Sirius - SUBX1 -Portable audio system for your SP4-TK1 (sold separately) The SUBX1 boombox makes the perfect companion for your Sportster Replay SP4-TK1 satellite radio. Enjoy SIRIUS programming on the beach, at a game, on your patio — wherever you go. Its clean, uncluttered look lends a touch of style wherever you use it. The SUBX1 sports a high-performance 3-way speaker system. Separate tweeters and midrange speakers combine with a single subwoofer to provide dynamic full-range sound, while the built-in amplifier delivers strong performance. While at home or at the office, power up the boombox with the included AC adapter. If you're on the go, you can operate the SUBX1 on eight "D" batteries (not included). Use the detachable windowsill antenna to optimize signal reception. You can listen to other audio devices through the SUBX1's auxiliary input.