M. 2 A/E KEY card port to Micro SD SDHC TF card reader adapter card.; TF card can be converted to M. 2 A/E KEY card interface as a card reader.; Only support 2230 net work card interface.; Only for the net work card adapter, TF card need to be purchased separately.; The motherboard of the computer must be A/E-key interface, other M. 2 B M-key interface can not be used.