An electrical connector includes an upper contact module, a lower contact module, an outer insulative housing inject-molded with the upper contact module and the lower contact module, a shielding mechanism at least partly fixed in the outer insulative housing and a metallic outer shell enclosing the outer insulative housing. The upper contact module includes a number of upper contacts and an upper housing inject-molded with the upper contacts. The lower contact module includes a number of lower contacts and a lower housing inject-molded with the lower contacts. The shielding mechanism and the metallic outer shell are in mechanical contact with each other for achieving a relative larger grounding area.