notice board. The study began to enter a new era - the "digital age." However, at this time we are facing a new problem. The vivid demonstration of multimedia courseware really attracts students to concentrate on learning. On the other hand, it allows teachers to be bound to the computer mouse and keyboard. Teachers use advanced multimedia technology to teach, most of the time sitting behind the computer screen, the most valuable teachers and students in the classroom face-to-face interaction less and less, students also rarely see the teacher's lectures rich and effective body language, There is a lack of emotional interaction between teachers and students. How to make teachers get rid of the constraints of the mouse and keyboard, and once again stand on the sacred podium, so that the information technology and the teacher's personal charm are perfectly combined, which has become a major problem facing the education community.. 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.