Volume control, output and input selector

I came across these boards, exactly what I was looking for:
4 IN 2 OUT, Remote control and Volume control.

I thought I might give it a shot. It's 85Euro... on the sort of cheap.

I know this is not a lot of info, but what do you think about this thing? Are there reasonably priced alternatives? 😕 A kit would be fun too 🙂
 

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