What is in the description, it is a Type II card - so you can assume that someone who owns a camera using CF cards also know if the thicker Type II go to his camera. In my EOS 5D MkII, the adapter works fine with a 64GB UHS-I and a 32GB Wifi Transcend. The promised Wifi functionality with respect to which I was skeptical is fully given. A test with video recording in Full HD also was successful. Whether the case of longer films or the use of Magic Latern even the works, I can not say, but I use my camera does not (currently). Thus, the adapter is a license to save money, SD cards are still significantly cheaper than CF and in acute space shortage on holiday sure to get even easier in Timbuktu as a CF card. I would also like a lance for the manufacturer / distributor (CSL) break, all the parts that I have acquired this label, its function fully meet - and at a very reasonable price (I'm neither used nor by any other way personally or financially connected with this company).