An electrical connector comprises a connector body. The connector body includes an insulative housing and a contact module received in the insulative housing. The contact module includes a spacer and a plurality of contacts received in the spacer. Each of the contacts have a foot portion for being mounted onto an external printed circuit board. The insulative housing has a plurality of mating ports defined in a vertical front face. The electrical connector also includes a connector standoff assembled under the connector body to support the connector body. The connector standoff includes a base portion and four locking arms extending from the base portion along a down-to-up direction, and two of the locking arms engage with the spacer. The foot portion extends downwardly through the connector standoff.