okay thanks dan, another question, if i buy the European Z-wave controller (220v),will the US (Non-European) Z-wave devices that run on batteries work on that controller or not because of the frequency issue? like for example can i add the kwikset smartcode deadlock to my european z-wave network? if not..can i just buy the US Z-Wave controller and and just use a step down transformer but i guess then the dimmers and switches wont work because they have to be 220v right?