A cable connector assembly (100) comprises a mating member (3), a printed circuit board (2), a LED (24) attached to the printed circuit board, a cable (6), a light pipe (4) having a visible area (431), an insulative shell (1), and a ring member (5). The cable has a positive wire (61) and a negative wire (62) connected with the mating member (3), and a strain relief portion (64) molded on the wires and neighboring to said light pipe. A detective contact (631) is connecting with the cable. The insulative shell encloses the printed circuit board, the cable and the mating member. The visible area (431) is exposed out of the insulative shell. The ring member has a slick loop portion (51) located in said light pipe and a retaining portion (52) with a rugged exterior surface, and said strain relief portion is molded on the retaining portion.