folding whiteboard. It can be combined with any smooth and hard plane to form an electronic whiteboard, which is convenient, flexible and economical. Ultrasonic, infrared wireless positioning technology, suitable for large-area high-density color painting, high resolution, fast response, and sensitive operation.. 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.