Bose Companion 5 Multimedia Speaker System  Graphite/Silver No special software, sound card upgrade, adaptors or complicated wiring required.Do not unplug any cables during this setup procedure. Speaker arrays come fully assembled on stands for superb performance and more usable desktop space and magnetically shielded satellite speakers prevent monitor interference or damage to magnetic media Handy control pod houses volume control, single-touch mute, headphone jack and connection for a second audio source such as an MP3 player Proprietary integrated signal processing delivers lifelike performance at almost any volume level. Control pod: 2.5 H x 1.13 W Inches Compression circuitry keeps your music clear and undistorted at high volume levels, Acoustimass module - 21.8 cm H x 17.3 cm W x 42.5 cm D