A receptacle connector mounted upon a printed circuit board and adapted for mating with a plug connector, includes an insulative housing, a number of terminals disposed in the insulative housing, a metal sheet, and a shielding shell attached to the housing. The housing includes a first insulative housing defining a first tongue portion extending forwardly, a second insulative housing defining a second tongue portion extending forwardly, and a third insulative housing defining a third tongue portion extending forwardly. The terminals include a number of first contacts and second contacts. The third insulative housing is over-molded with the first insulative housing, the metal sheet, and the second insulative housing to enclose the first tongue portion and the second tongue portion into the third tongue portion and the first contacts and the second contacts respectively exposed on an upper and a bottom surface of the third tongue portion.