7 touch screen displays.The four corners of the surface acoustic wave touch screen (Figure 4 ) are installed with vertical or horizontal ultrasonic transmitting transducers and receiving transducers, respectively. The four sides are also engraved with reflection stripes to emit ultrasonic signals like reference waveforms. When a finger touches the screen, it will absorb part of the sound wave energy, and the controller calculates the position of the touch point based on the weakened signal.

7 touch screen displays.The four corners of the surface acoustic wave touch screen (Figure 4 ) are installed with vertical or horizontal ultrasonic transmitting transducers and receiving transducers, respectively. The four sides are also engraved with reflection stripes to emit ultrasonic signals like reference waveforms. When a finger touches the screen, it will absorb part of the sound wave energy, and the controller calculates the position of the touch point based on the weakened signal. 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.