An electrical connector includes an insulative housing defining a mating cavity, two parallel and stacked mating portions respectively forwards extending into the mating cavity, sets of contact retained in the housing and a grounding member retained in the housing. The first mating portion defines thereon a first surface; the second mating portion spaces from the first mating portion and defines thereon a second surface opposite to the first surface. The sets of contact include a first set of contacts each defining a contacting section exposed upon the first surface and a second set of contacts each defining a deflectable cantilevered beam accessible from the second face. The grounding member is disposed between the first and second mating portions to reduce the cross-talk between the first and second sets of contacts.