A connector includes an insulating housing, a circuit board, a flexible piece, and a plurality of guide rods. The circuit board has a front end configured to dock with a docking connector, a back end distal to the front end, and a plurality of gold fingers disposed at the front end. The back end is embedded in the insulating housing and the front end is extended outwardly from the insulating housing such that each gold finger is exposed at a surface of the circuit board. The flexible piece is installed at a top surface of the insulating housing. The flexible piece is used to engage with the docking connector. Each gold finger can be electrically connected to the docking connector. Each guide rod is disposed at two opposite sides of the insulating housing. Each guide rod extends outwardly towards the docking connector.