legamaster digital whiteboard. Expanding and enriching the functions of traditional computer multimedia tools, and improving the audio-visual effects, drag-and-drop, photography, hiding, screen-drawing, coloring, matching, instant feedback and other functional modules in the electronic whiteboard, these wonderful visual and auditory effects, It has greatly improved the students' attention and understanding, stimulated the students' interest, and mobilized the students to actively participate in the teaching process.. 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.