Philips Wireless Home Theater System. Optical disc player type: DVD player, Disc types supported: CD, CD-R/CD-RW, DivX, DVD, DVD+R, DVD+RW, DVD-R, DVD-Video, MP3-CD, MPEG4, WMA. Video formats supported: DivX 3.11, DivX 4.x, DivX 5.x, MPEG1, MPEG2, MPEG4, XviD, Analog signal format system: NTSC, PAL, Aspect ratio: 4:3, 16:9. RMS rated power: 500 W, Audio output channels: 5.1, Signal-to-Noise Ratio (SNR): 95 dB. Center speaker frequency range: 120 - 20000 Hz, Center speaker impedance: 3 Ом. Number of satellite speakers: Magnetically shielded front, Satellite speaker frequency range: 120 - 20000 Hz, Satellite speaker impedance: 6 Ом