I'll take a look for which MULF2 it is. To be honest, I wasn't even aware there were different MULF2 versions.
Anyways, while searching around, if all you want is USB, the following looks like a cheaper/easier option.
http://www.newegg.com/Product/Produc...9SIA0920667333
I wish I would have known about this, because all I really wanted was the USB functionality. The bluetooth was sort of a cherry on top / nice to have thing for me.