[SOLVED] Weird component connected to my motherboard

Aug 23, 2019
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Hello everyone, this is my first time in the forum so please go easy on me.

Anyway, recently I found a small device connected to my motherboard and have no idea what it is. My PC is a custom build, but it has not been put together by me, I only chose the individual components, so I received it with this ''device'' attached. In the foto you can see the component, on which the word ''speaker'' is written. It is just a cable attached to that plastic cylinder.
If anybody knows what it is used for, I would appreciate your help.

My specs:
CPU: AMD Ryzen 5 2600
GPU: GTX 1050 ti
Motherboard: MSI B450 Gaming Plus
RAM: Corsair Vengeance LPX 2x8GB 2400 MHz