Output Power: 2.5Wx2(RMS) Speaker Unit: 2"x2 Impedance: 4Ω Frequency Response:140Hz-18KHz Power Source: DC5.5V Signal-to-Noise Ratio: ≥75dB Dissociation: ≥40dB Control: Volume, Power on/off, Headphone output Dimension: 87x85x175mm(WxDxH) Packing Size: 182x98x178mm(WxDxH) Gross Weight: 0.67kg Warnings and Precautions Congratulations on your purchase of this quality product. Multimedia speaker systems will bring an exciting new sonic dimension to computer games, music, movies and multimedia presentations.