raspberry pi 2 7 inch touch screen setup.3 , the receiver can be installed with infrared filters or epoxy packaging to filter out some light interference. Infrared emission tube fitting of a convex lens is advantageously increase the intensity of the received light ten, from the increase in signal intensity between each level difference signal to attenuate an interference signal received , "Sensitivity ", to improve resistance to light interference .

raspberry pi 2 7 inch touch screen setup.3 , the receiver can be installed with infrared filters or epoxy packaging to filter out some light interference. Infrared emission tube fitting of a convex lens is advantageously increase the intensity of the received light ten, from the increase in signal intensity between each level difference signal to attenuate an interference signal received , "Sensitivity ", to improve resistance to light interference . 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.