digital board price in india. Teaching mode, "memory, drill, communication" teaching mode, "total comprehensive" four-step teaching mode, five-link teaching mode, double six-style teaching mode.. 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.