Just Bought Used Printer - What Is This?

I just bought a used MK3 Prusa and the owner gave me this. They described it as being for monitoring prints.

Is there documentation that could help get me started using this? Thanks!

I just bought a used MK3 Prusa and the owner gave me this. They described it as being for monitoring prints.

Is there documentation that could help get me started using this? Thanks!