Sony SHAKE-X10D High Power HIFI SystemSound pressure horn speakers Multi colour lights and fiestable app Connect multiple sets with party chain Karaoke and guitar function USB, BT & NFC for music streaming Sound Pressure Horn for bass you can feel Be blown away by soul shaking bass with the Sound Pressure Horn. An internal folded horn design efficiently increases acoustic pressure by pushing energy through an amplifying duct. The result is far more effective than traditional, energy