The Logitech Z-5500 Digital 5.1 THX Computer Speakers 500W are high-quality computer speakers designed for immersive surround sound experience. Featuring a 5.1 channel system configuration with THX-certified audio quality, these speakers deliver powerful audio performance with a total RMS power of 500W. They come in a sleek black and silver color scheme and offer connectivity options with digital optical TOSLINK inputs. The speakers also include a remote control for easy adjustment and are AC powered for convenient setup. Ideal for gamers, multimedia enthusiasts, and audio professionals, the Logitech Z-5500 Digital speakers provide exceptional sound quality for an enhanced computing experience. System is tested and works.