Acoustic Audio AA5150 Home Theater 5.1 Speaker System 400W with Powered Sub Power Rating: 400 Watts RMS System Power Frequency Response: 20Hz - 20KHz SD Card, Flash Drive MP3 Player and FM Tuner 5 Discrete Independent Channel Input/output for true surround sound Magnetically Shielded Speakers with Computerized Enclosure Design Plug and Play Connections