Audiovox SIR-BB1 Sirius Satellite Radio Portable Boombox for SIR-PNP2 Receiver Listen to Sirius digital radio indoors or out; runs on supplied AC/DC adapter or 8 D batteries (not included) Designed for use exclusively with the Audiovox SIR-PNP2 Sirius satellite radio receiver; Sirius satellite radio subscription needed (satellite radio) is not included, sold separately. Auxiliary input lets you hook up a CD player, MP3 player, cassette deck, or other audio device Simple setup and operation; headphone jack provides private listening or hookup with an external amplifier/speaker system Measures 19.1 x 7.75 x 6.8 inches (W x H x D)