Philips HTS3531. Optical disc player type: DVD player, Disc types supported: CD, CD-R, CD-RW, DVD, DVD+R, DVD+RW, DVD-R, DVD-RW. Video formats supported: DIVX, MPEG1, MPEG2, MPEG4. RMS rated power: 300 W, Audio output channels: 5.1, Audio decoders: Dolby Digital. Supported radio bands: FM. Center speaker RMS power: 50 W, Center speaker frequency range: 150 - 20000 Hz, Center speaker impedance: 4 Ом