2.1 & 5.1 Channel ExchangePowerful Bass & High Stereo SperationAll Function Remote ControlEthereal Touch Keystone DesignOutput Power: 30W + 10W x 5Speaker Unit: 5.25? (3?1.5? x 5 Size(WXDXH)mm: Woofer 166x320x260 Central: 230x105x105 Satellites 105 x 105 x 160TRated Impedance:4 OhmFrequence Response:20Hz - 18KHzS/N Ratio: ≥80dB