Audiovox XB9 XM Satellite Radio Boombox Portable boombox with built-in dock for Audiovox XR9 XM satellite radio receiver (sold separately) Pair of 4-inch stereo speakers with 1-inch tweeters; class D amplifier offers enhanced sound reproduction 30 Hz to 20 kHz frequency response; nominal power output of 5 watts per channel Auxiliary input for connecting iPod, MP3 player, or other device; 3.5 mm stereo headphone jack Runs on 8 C-size batteries or AC adapter; measures 19.19 x 8.4 x 7.57 inches (W x H x D); 1-year warranty