digital whiteboards in sri lanka. A good whiteboard must be highly sensitive. The user can try to write on the whiteboard, observe the reaction speed of the whiteboard, and observe the lag time of the whiteboard display. If the lag time of the whiteboard image is obvious, the sensitivity of the product can only be said to be low. The speed of this reaction is clear at a glance, and the whiteboard is sensitive, so the user can see it at a glance.. 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.