1. Build-in touch control function menu, it makes the common function of signal source switching, sound adjustment, brightness contrast adjustment, image resolution adjustment etc. into one control menu, without any physical buttons, just use figure to call out the touch menu on the screen, which is more convenient.
2. In the embedded Android system, it can read and classify the courseware files automatically by USB. And easily to find and open the office documents, music, video, pictures, etc., directly.
3. In any channel, it can call out the touch menu quickly on anywhere of the screen, to make real-time annotation, screenshots, shorcut whiteboard, which is more convenient for connecting the external equipment.
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