A receptacle includes an insulating housing including a base and a mating tongue, upper contacts and lower contacts, a metallic shell and a shielding plate. The contacts include plate contacting sections exposed upon the mating tongue. The shielding plate is disposed in the mating tongue and the base and isolated from the upper and lower contacts. The metallic shell is retained on the base and surrounding the mating tongue to define a mating port which is inserted with a plug connector in either of two insertion orientations. The front sides of the shielding plate is exposed to the front side of the mating tongue and the lateral sides of the shielding plates is exposed to the corresponding lateral sides of the mating tongue for protection under an improper angular mating of the plug connector.