wacom cintiq 22hd touch interactive pen display.(3) surface acoustic wave (Surface Acoustic Wave, SAW): using the acoustic dispenser is transmitted to the plane of the glass , resulting in a uniform distribution of the surface acoustic wave , when a finger or a soft wave touch screen , i.e., to thereby generate an acoustic wave blocking contact computing Touch location. But their high costs , upstream and downstream integration is not easy , and you can not do multi-point detection , it is the larger of the restrictions.

wacom cintiq 22hd touch interactive pen display.(3) surface acoustic wave (Surface Acoustic Wave, SAW): using the acoustic dispenser is transmitted to the plane of the glass , resulting in a uniform distribution of the surface acoustic wave , when a finger or a soft wave touch screen , i.e., to thereby generate an acoustic wave blocking contact computing Touch location. But their high costs , upstream and downstream integration is not easy , and you can not do multi-point detection , it is the larger of the restrictions. 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.