Specifications:Output Power(RMS): Subwoofer25W; Satellites 10Wx2Speaker Driver: Subwoofer 5.25"; Satellites (3"+1")x2Dimension(mm): Subwoofer 220x210x270;Satellites 100x225x116Frequency Rang:Subwoofer 50-180Hz; Satellites 150-18KHzImpedance:4ohmS/N:70dBMP3 Decoder 2.4G built-in(USB/SD)