large white dry erase board. Period, product maturity, product decline, product transition period. At present, China's market is in its infancy, and its products have undergone the development of the last three years. In 2007 , the electronic whiteboard realized the transition from the introduction period to the growth period. Before 2007 , electronic whiteboards were widely used in various industries, but each industry did not form a huge market space. The market scale grew slowly, and the number of electronic whiteboards was also very few. With the advancement of the new curriculum reform in the country, the need for basic education to reform classroom teaching has rapidly improved the application status of electronic whiteboards in the education industry and created a huge demand space. According to China Power. 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.