Methods, systems, and apparatus for engaging a wireless communication device assembly to a housing. In one aspect including a wireless communication device assembly adapted to engage a knockout hole in a housing after removal of a knockout blank from the knockout hole, the wireless communication device assembly adapted to connect to the base unit and comprising: a housing engagement portion being of dimensions to at least substantially cover any uncovered portions of the knockout; a remote unit portion positioned outside of the housing when the wireless communication device assembly is engaged with the knockout hole, the remote unit portion having a remote unit surface distal from the housing engagement portion; and at least one of: an antenna device to receive wireless communications and a stimulating device that upon actuation of the stimulating device causes the base unit to perform one or more predefined operations.