Richard, If you are still following this thread, could you please take a peek at the label on the back of your Kill-A-Watt and compare it to
this and flag any differences for me? Note especially the red arrows.
I'm wondering if your unit is an improved version.
I bought mine at Menard's, and they appeared to have been hanging on the rack for quite some time (packaging covered in fine dust). Also, the printing on the cardboard label inside the thermal-welded plastic packaging is copyright 2011.