An electrical assembly includes a metallic cage including a plurality of faces to commonly form a receiving space; a receptacle connector located in a rear portion of the receiving space; and a heat sink member mounted on an outer side of the metallic cage. The heat sink member comprising a first portion located on one of the faces, and a second portion located on another one of the faces. The first portion and the second portion are associated with the metallic cage by different mechanical structures. The first portion and the second portion are thermally connected with each other.