portable learning smart board. Group cooperation - remote negotiation mode, "topic exploration - website development" , model of digital learning mode, Zhu Zhiting summarizes individual induction, practice and practice, teaching test, teaching. 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.