US D280721 S
FIG. 1 is a top plan view of a plug-mounted, background noise amplifier enclosure showing our new design with part of the top wall broken away;
FIG. 2 is a front elevational view;
FIG. 3 is a rear elevational view;
FIG. 4 is a bottom plan view;
FIG. 5 is a left side elevational view; and
FIG. 6 is a right side elevational view.