Eos Digital Multi-Room Wireless Audio iPod Speaker System, in black. Includes 1 Eos stereo base with built-in subwoofer PLUS 1 Eos stereo satellite wireless speaker with built-in subwoofer. Eos Wireless system can transmit to up to four Eos wireless speakers. Eos GigaWave technology broadcasts interference-free wireless home audio up to 150 feet indoors and 300 feet outdoors. SRS Wow technology ensures superior sound quality. Additional Eos stereo wireless speakers sold separately - Model # EOS-100R (white) or EOS-100RB (black). Also includes: 1 remote control to control the base and core IPod functions; 1 auxiliary cable for connecting other audio devices (computers, MP3 player, stereos, radio, etc.); and 5 universal iPod adaptors for older generation iPod models