A cable assembly (100) includes an insulative housing (1) having a top side, and a cavity (111) is defined in the top side; a plurality of contacts (2) received in insulative housing, said the contacts including two power contacts partially disposed under the cavity; a plurality of wires (3) electrically connected to the contacts, respectively; a printed circuit board assembly (5) received in the cavity, the printed circuit board assembly (5) having a substrate (50) with a light emitting diode (504) thereon, the lighting emitting diode electrically connected with the two power contact; and a light guide member (6) assembled to the cavity and located above the light emitting diode.