digital whiteboard art. Many users choose the whiteboard through the above comparison, they will be satisfied and return, the most easy to ignore the after-sales problem, often regretted after the product has problems. Therefore, after selecting the whiteboard, it must be seen whether the manufacturer can provide perfect after-sales service for itself.. 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.