2.1ch surround sound system. 3 HDMI inputs for multiple device connection. 400 watts. 200 watt subwoofer. 2 satellite speakers, each 100 watts. Built in radio tuner. Active amp. Optical audio connection. Built in Dolby Pro Logic II decoder. Dolby digital. DTS surround sound. Separate remote control included. Remote control requires 2 x AA batteries (included). Size of subwoofer (H)37, (W)21, (D)35cm. Size of satellite speaker (H)16, (W)10, (D)7.7cm.