Shielded board-mounted electrical connector

An electrical connector comprising:

• an insulative housing comprising a mating portion, the mating portion defining a receiving space surrounded by two longitudinally extended sidewalls, two end walls and a plurality of terminal channels communicating with the receiving space, each sidewall defining a plurality of notches;
• a plurality of conductive terminals received in corresponding terminal channels and each having a contact portion;
• and
• a pair of shielding shells having substantially symmetrical structure and respectively attached to the housing, each shielding shell having a flat portion enclosing said sidewall, and the flat portion providing a plurality of latches extending therefrom received in said notches and a plurality of grounding tails extended in a bottom thereof and being substantially perpendicular to the flat portion;
• wherein said insulative housing has a tongue plate extending upwardly from a bottom of the mating potion, and said terminal channels are defined in two opposite sides of the tongue plate;
• wherein each shielding shell further comprises a pair of wings located at two opposite ends of the flat portion;
• wherein the connector further comprises a metallic beam and the metallic beam comprising an elongated base, a plurality of tabs extending from the base, and a plurality of grounding tabs for electrically connecting with the wings of the shielding shell;
• wherein said tongue plate defines a plurality of mating holes in a top thereof for receiving tabs of the metallic beam;
• and
• wherein each sidewall forms plural pairs of protrusions and each pair of protrusions defines a recess therebetween for receiving said grounding tails.