whiteboard with lines. Since its establishment, it has undertaken dozens of topics such as national scientific and technological research, the National Natural Science Foundation, the Doctoral Fund, the Ministry of Education, the Ministry of Commerce's export research and development projects, and the provincial science and technology development major projects. On this basis, the company has developed high-tech products such as DM series wireless positioning electronic whiteboard and DM series mobile phone signal shielding. Its products have been exported to the Netherlands, France, Belgium, South Korea and the Middle East and other countries and regions, and are welcomed by the market.. 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.