A module housing for minimizing electromagnetic radiation leakage and a transceiver module built with this housing are presented. The housing includes a cover and a base disengagably coupled to each other, and a first and second layer of sidewalls located between the cover and the base. The two layers of sidewalls have different dimensions from each other so that a printed circuit board is enclosed in a space formed by the base, the cover, and either only the second layer of sidewall or both the first and second layer of sidewalls, depending on the thickness of the board. Another aspect of the invention is a pcb coupled to a connector and a housing for the pcb that includes an electromagnetic radiation shield between electronic components on the pcb and the connector. The shield reduces the amount of radiation reaching the connector. Also disclosed is a method of building this module.