Item have some slight surface scratches from normal used. 5-speaker surround sound system includes 4 Jewel Cube speakers and one center channel speaker, balanced by an Acoustimass module to deliver a fuller range of sound. Unify Intelligent Integration System allows for guided setup and simplified use/programming with easy-to-follow onscreen messages. ADAPTiQ audio calibration system analyzes your room's dimensions and other variables, then automatically adjusts the sound of your Lifestyle surround sound system. HD connectivity for up to 6 sources (4 HDMI, 2 audio HD), video upscaling to 1080p.