how much is a interactive screen.12. Math mode and tools: provide grid and Japanese grid background templates; provide ruler, triangle plate, compass, protractor to draw graphics such as straight lines, circles, corners, arcs, and sectors, which can be displayed when using compasses to draw arcs and sectors Drawing angle; supports drawing of circles, rectangles, triangles, polygons, etc. You can use the rubber band function to draw graphics, support handwritten automatic recognition of graphics, and set transparency of graphic object colors; support automatic display of radius and center of circle after drawing a circle ; Support drawing of three-dimensional graphics such as cubes, cuboids, cones, cylinders, circular tables, etc .; Provide functions graphics drawing, plane, three-dimensional coordinate system generation, mathematical formula handwriting recognition, mathematical calculator and other tools. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.