An electrical connector includes an insulative housing having a base with two opposite sides and a tongue extending forwardly from the base, a first insulator attached to one side of the base, a second insulator attached to the other side of the base, and a plurality of contacts including a first set of contacts sandwiched between the base and the first insulator, and a second set of contacts sandwiched between the base and the second insulator. The contacts each has a contact portion arranged on the tongue for mating with a corresponding plug.