digital whiteboard monitor. 2, because the board of the electronic whiteboard is generally made of high-quality wear-resistant materials, under normal circumstances, there will be no problem, but you must avoid using sharp objects (such as sharp things such as knives) Touch the board surface to avoid damaging and scratching the board surface. In addition, under normal circumstances, do not leave the writing on the board for a long time, so the writing is not easy to clean. In addition, it is important to note that in the process of using the electronic whiteboard, you cannot use the oil-based marker to write on the electronic whiteboard! In the unlikely event that this happens, the surface of the copyboard must be gently wiped with absorbent cotton and alcohol.. 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.