The receiver comes with the unit and I don't think it can purchased separately. It will be obvious because one controller will be much more then the rest. It should say PC windows on the front label and will mention the receiver. It actually isn't Bluetooth, its 2.4Ghz and the range is pretty ridiculous. I can be outside my apartment and still operate though blindly, heh. Last item is any xbox 360 controller works with the receiver in case your doing some two player or more ROM action.