Actually, this one is totally undetectable. I bought one for use during my tenure in the US. Needlessly to say, it works wonders elsewhere as well. It paid itself off during my very first trip in April 2012 and has saved me over two dozen times since.
And the consequences if [somehow] caught with it in Ontario and the Eastern Provinces is a messily fine and they confiscate it on the spot. No major charges or anything serious.
GLWS, OP. It's a great product.
'12 M3 6MT Alpine White + Fox Red Extended | '09 328i 6MT Space Gray + Black