An electrical connector includes an insulative housing, which includes a base section and at least two spaced and parallel longitudinal mating tongues projecting from a front face of the base section, a plurality of terminals attached on opposite surfaces of each mating tongue and a shell attached to the insulative housing. The insulative housing is provided with at least a transverse rib interconnecting corresponding longitudinal ends of the mating tongues to define a first mating frame. The shell is provided with a frame section independently serving as a second mating frame. The second mating frame surrounds the first mating frame to define an annular recess therebetween.