An apparatus comprises a first housing having a top surface and a bottom surface, a second housing having a top surface and a bottom surface, and one or more supports coupling the first housing to the second housing such that the first and second housings are electrically connected and the bottom surface of the first housing overlays the top surface of the second housing. The one or more supports are configurable in at least a first configuration wherein the bottom surface of the first housing and the top surface of the second housing are substantially contiguous with one another and a second configuration wherein the bottom surface of the first housing and the top surface of the second housing are separated by a space.