US D318022 S
FIG. 1 is a top and front perspective view of a radon monitor showing my new design;
FIG. 2 is a top plan view;
FIG. 3 is a front elevational view, the rear elevational view being a mirror image;
FIG. 4 is a left side elevational view, the right side elevational view being identical; and
FIG. 5 is a bottom plan view thereof.
The back side is identical in appearance to the front side and the left side is identical in appearance to the right side.