Acoustic Audio's 2.1 Powered Speaker Systems are 3-piece systems that include one powered subwoofer and two satellite speakers as well as all the necessary cables and instructions needed to "Plug and Play" any audio source. Use it for your home theater stereo system, personal computer or laptop, DVD player, TV, gaming system, "i" device, MP3 player, or other devices with a 3.5mm or RCA audio output (3.5mm to RCA cable included).