Altec Lansing MX5021 2.1 powered audio system. RMS rated power: 90 W, Frequency range: 30 - 22 Hz, Signal-to-Noise Ratio (SNR): 80 dB. Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 398 x 310 x 220 mm, Surround speaker dimensions (WxHxD): 260 x 132 x 63 mm