I found this unit online and I kind of like it.
But, I can't seem to figure out if this can switch between two guitars??
If it can, how does it work then??

Thanks! (Y)
That is not designed to switch between two guitars, it's designed to route the signal from one input to different outputs.

You may use a simple passive summing box for connecting two guitars to the same amp.

Thing is, you may simply switch the jack from one guitar to another when you switch guitars, and that would be a lot more convenient unless turning the amp off or in standby or with the volume to 0 was a problem.

So, what is it that you wanna do exactly?