If you read the new Cross RC manual there is a whole sectin about something called "U-Mix Control Pro 2". And there was some info on this lately but I think, it's not only me, who wants more info in that.
The maual don't have a picture of it, only a picture of the back and the front, but not from the top, and don't see many differences, except that U-Mix Control Pro 2 has to headphone jacks, a big and a small one.
So please feed the info machine
