Combo of capacitive touch display and Blackboard. Through classroom observation, observation notes, teacher teaching experience, interviews with teachers and students after class, teaching case analysis and supplemented by certain questionnaires and other methods for data collection , on the basis of collecting relevant data , the model is continuously improved , for small. 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.