... substitute few common devices: white board, computer, projector, TV, projector screen, speakers system. Touch panel is cost effective ... )Video StandardPAL/SECAMAudio Output Power2X15WTV Board Input SD Card1Multi-Media(USB)2HDMI2USB3.02RF(TV)1VGA1VGA AUDIO1YPbPr ... and single power cable connection.includes functionality of Projector with screen,TV, LCD monitor,Whiteboard,Sound system, ...