pros and cons of interactive whiteboards in the classroom. Has a rich expressiveness. Multimedia technology enables knowledge content to be represented by text, images, animations, sounds, images, and the like. The use of multimedia technology can stimulate students' multiple sensory organs, help students' memory and enhance students' thinking ability.. 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.