Specifications:Output Power(RMS): Subwoofer25W; Satellites 10Wx2Speaker Driver: Subwoofer 6.5"; Satellites (3"+1")x2Dimension(mm): Subwoofer 220x264x348;Satellites 100x206x106Frequency Rang:Subwoofer 60-180Hz; Satellites 150-18KHzImpedance:4ohmS/N:70dBMP3 Decoder 2.4G built-in(USB/SD)