Altec Lansing BXR1221. RMS rated power: 9 W, Frequency range: 50 - 18000 Hz, Signal-to-Noise Ratio (SNR): 74 dB. Connectivity technology: Wired. Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 126 x 158 x 185 mm, Surround speaker dimensions (WxHxD): 70 x 121 x 94 mm