outdoor touch screen displays.When there is no touch on the transmitted signal and received signal waveforms, the received signal waveform is exactly the same as the reference waveform. When a finger or other object capable of absorbing or blocking the sound wave energy touches the screen, the sound wave energy that the X axis travels upwards through the finger part is partially absorbed, reflecting that the waveform has an attenuation gap on the receiving waveform, that is, at a certain time position.

outdoor touch screen displays.When there is no touch on the transmitted signal and received signal waveforms, the received signal waveform is exactly the same as the reference waveform. When a finger or other object capable of absorbing or blocking the sound wave energy touches the screen, the sound wave energy that the X axis travels upwards through the finger part is partially absorbed, reflecting that the waveform has an attenuation gap on the receiving waveform, that is, at a certain time position. 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.