digital whiteboard vs. 2. Mouse function, the pen tip of the electronic pen is equivalent to the left mouse button, and the pen button is equivalent to the right mouse button. Use the electronic pen to realize mouse click, double click, select, drag, right click and other functions;. 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.