[SOLVED] What are these things on the side of these monitors?

[vkrugmann2003]

Hello, so I noticed these things on the side pf many AOC Monitors. I just wondered what they are called and what they are used for. I can't seem to find them on any feature or spec sheet.

https://imgur.com/a/Lt5oBfT

View: https://imgur.com/a/Lt5oBfT

 

[kanewolf]

Headphone hangers