whiteboard presentation. Calculate, each purchase of five sets, a total of 5,000 sets; the national research institutes according to 500 calculations, each buy five sets, total. 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.