An electrical connector (100) includes an inner insulative member (1), a number of contacts (2) mounted to the inner insulative member, an outer housing (3) mounted to the insulative member, and a shielding member (4). Each of the contacts includes a mounting end (23) for being mounted to an inner portion of a device. The outer housing defines a pair of mounting holes (331), and a pair of injection holes (351) respectively in fluid communication with the mounting holes. The shielding member includes a pair of mounting legs (421) inserted through respective mounting holes for being mounted to the inner portion of the device. A gap is formed between each of the mounting legs and a corresponding mounting hole. Glues seal the injection holes to prevent fluid flow from the hollow portion into the inner portion of the device.