Logitech X220, 2.1 channels, 32 W, 64 W, 92 dB, 4.02 x 4.25 x 5" (102 x 108 x 127 mm), Wired Logitech X220. Audio output channels: 2.1 channels, RMS rated power: 32 W, Peak Music Power Output (PMPO): 64 W. Signal-to-Noise Ratio (SNR): 92 dB. Dimensions (WxDxH): 4.02 x 4.25 x 5" (102 x 108 x 127 mm). Connectivity technology: Wired