The electrical connector includes an insulative housing, a plurality of upper/first contacts and lower/second contacts retained in the housing, a reinforcement piece located between the upper contacts and the lower contacts in the vertical direction, and a metallic shield enclosing the housing. The housing includes a first insulator carrying the first contacts with a first tongue thereof, and a second insulator carrying the second contacts with a second tongue thereof, and the reinforcement piece is located between the first insulator and the second insulator wherein the reinforcement piece includes a relatively thin conductive film or layer located between the first mating tongue and the second mating tongue in the vertical direction.