order whiteboard online. 4. How to end the visit. This is also an important aspect of the visit to the home . To end the visit, be polite and avoid rushing away. If asked about the purpose of visit of visitors , should do their best to explain , to the visitor left a good impression , we should be spending their time and thanked the good cooperation , but also may for the next Access is accurate. 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.