interactive whiteboard accessories. That is, how to collect the coordinates of the whiteboard pen in real time when the user writes and draws on the whiteboard. The interactive whiteboard supported by the wireless positioning technology jumps out of the traditional habit of positioning on the whiteboard, and skillfully realizes positioning in the wireless space, thereby making the whiteboard pen more sensitive, greatly improving the system tracking speed and expanding the available area of ??the whiteboard. It solves the problems that the board is not smooth, the writing font is out of shape, and the positioning is prone to deviation.. 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.