large whiteboard with lines. 2.IQAio GR511 Being a high end multi-media teaching equipment, IQAiO GR511is integrated with central control system, computer, IWB, document camera and audio amplifier, forming a perfect multi-media classroom solution together with a projector. Moreover, IQAiO GR511 has an advantage over the touch flat panel in terms of its large size reaching up to 102 inches to satisfy specific demands of the market. Compared with traditional classroom, IQAiO GR511 forms a perfect classroom solution only with a projector. The 150 inch IQAio GR511 has super-wide dual-screen interaction, which can satisfy large classroom requirements. . The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.