electronic interactive whiteboard. Usually in many cases , investigators can not be the order of the rules in order to ask questions , this time , investigators should be adjusted to the idea of being a visitor , so concentrate on the theme , back order to ask questions , but can not be cut abruptly interrupted , affecting. 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.