The Logitech Z506 Surround Sound 5.1 Computer Home Theater Speaker System with Subwoofer is a high-quality audio system designed for immersive surround sound experience. It features a sleek black rectangular design made of plastic, with Dolby Pro Logic surround sound formats for enhanced audio quality. This wired speaker system includes stereo L/R RCA and 3.5mm jack audio inputs, making it compatible with a variety of devices. The Logitech Z506 offers a 5.1 channel configuration and comes with a subwoofer for powerful bass, perfect for creating a home theater setup.One speaker is missing from being a complete set