Samsung HT-AS720ST Blu-Ray 5.1 Channel Home Theater System (Set of Seven, Black) 5.1 channel home theater system with Blu-ray technology Includes 4 satellite speakers, 1 center-channel speaker, 1 subwoofer and 1 A/V receiver Blu-ray full HD playback Multiple decoding formats built-in including Dolby Digital, Dolby ProLogic II, and Dolby ProLogic Total power: 650 watts