An electrical connector includes an insulative housing enclosed within a metallic shell wherein the housing forms a mating cavity and the shell includes a first shell and a second shell assembled together. The first shell includes a main body abutting against the housing, and a folded plate abutting against the main body and having a plurality of first spring tangs for engagement with the case in which the connector is position. The folded plate forms a securing tab and the housing includes a retention slot receiving the securing tab therein so as to prevent outward movement of the folded plate in the vertical direction.