clear whiteboard. Get the original first-hand information. In the face-to-face interview survey , there are many factors that influence the success of the survey , such as the quality of the investigator, the suitor's clothing, tone, and access methods. Therefore , in order to be successful , it is necessary to strengthen the investigator's own quality and strengthen the interviewer's access skills.. 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.