Altec Lansing FX5051 Speaker System - 5.1-channel. RMS rated power: 28 W, Frequency range: 30 - 20000 Hz, Signal-to-Noise Ratio (SNR): 75 dB. Amplifier output power: Integrated. Connectivity technology: Wired. Cables included: 1 x 5.1 channel audio line-in 1 x USB 1 x headphones. Dimensions (WxDxH): 9.8 x 9.8 x 13.3 mm, Audio output channels: 6.1