a whiteboard. The electronic whiteboard is a new digital teaching tool that replaces the traditional blackboard and chalk. It is a revolutionary breakthrough in the old teaching and conference mode of the " three in one " of blackboard, chalk and eraser . It integrates elements such as digital processing, multimedia, distance learning, and teleconferencing to solve the shortcomings of traditional methods in teaching, conference and product demonstration activities. It is an ideal choice for computer-aided teaching in the network age. The interactive whiteboard has had a profound impact on the transformation of the teaching system and the improvement of teaching methods.. 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.