Roland V-4Ex ???c Bi?t ??n L� Thi?t B? Ch?t L??ng Cao L� Th�nh Vi�n Trong Gia ?�nh Huy?n Tho?i V-4;V-8 Bao G?m ??u V�o/Ra Hdmi Progressive Internal Processing, Audio Embedding, Usb Streaming V� T�ch H?p Touch Monitor.