Logitech Z506 6-Piece 5.1 Channel 101W Surround Sound Multimedia Speaker System (Certified Refurbished) Certified Refurbished product is tested & certified by Logitech to work like-new. The product includes all original accessories, and is backed by a 90 Day warranty. Sleek, stylish design, Surround Sound with 3D stereo Multiple inputs let you connect your PC, game console, iPod, DVD player, and more Ported, down-firing subwoofer for deep bass that brings your music, movies, and games to life Bass Control Knob, Headphone in jack, Power Button