Samson - SR Wired Over-the-Ear Headphones - Black

No, headphones, not a headset. Some computers have one connector for both mic and headphones - you can get a Y adapter if needed

Unfortunately they cannot be turned

No, it’s hard wired

These particular head phones do not. However i did see other headphones offered in the same price range, that did have mics on them. (I personally dont use that type, as i have actual mics, for voice recording, etc.) Im sure you can find what youre looking for. Best Buy does have a large selection of headphones.

Thet are adjustable. Im sure theyll fit a child, to an adult.