Question What is the sound coming from inside the mouse?

[Akahs]

When I shake my Bloody W60 Max mouse, it sounds like something's broken inside. What is this sound? I bought my mouse 2 days ago and everything works fine.

 

[rgd1101]

the only way to know is to open it.

 

[Akahs]

the only way to know is to open it.

I don't want to open it. Any guesses?