An electrical connector (1) includes a terminal module (32), a metallic shield (31) shielding the terminal module, an outer dielectric cover (10) substantially surrounding the shield and a button (40) attached to the cover. The terminal module includes a mating portion (323) having a number of conductive terminals (322) exposed therein. The shield provides a resilient latching beam (20) at a front portion thereof. The latching beam includes a driving portion (22) and an outwardly extending latching portion (21) adjacent to the mating portion. The cover has an inwardly projecting post (111). The button includes an operating base (43) and an actuator arm (41) being pivotally movable about the post to push the button outwardly.