A:AnswerWhile it can be mounted to the wall with the appropriate VESA compatible mounting hardware, it does not come with any wall mounting hardware. The included mount is for desktop use.
A:AnswerThis monitor does not have built-in speakers. You must purchase separate speakers to plug into either the monitor itself (through the audio jack) or through your device.
The "device" your computer is detecting for audio is the audio port in which you connect either speakers or headphones to.
A:AnswerAny sort of monitor can cause eye fatigue. If I were you, I would buy some blue light filtering glasses as blue light is the main cause. If you have prescription glasses, some companies offer a blue light filter included within the lens.