A:AnswerYes you can do that. I have tested it. If you want regular sound, you will have to hook up speakers to the audio line out jack on the monitor. It does not have internal speakers, but will convert HDMI audio to the analog line out jack, which is a standard headphone type jack.
A:AnswerYes, you can use this monitor as a gaming monitor. If your system supports the Discord application. No, this monitor does not have a built-in mic and speaker.
A:AnswerNo, this is not an all-in-one system, this is just a monitor display. You can check this link below for an all-in-one system: https://bit.ly/37mfnNJ
A:AnswerIt is not an all-in-one computer and thus does not have any operating system built inside. It is a computer monitor. Has two HDMI inputs and a power input.
It works great and is a beautiful screen.
I use it my Lenovo laptop as a third monitor. I run Windows 10 Pro.