Extech CG204 Coating Thickness Tester for Ferrous & Non-Ferrous Metals

Description

Extech CG204 Coating Thickness Tester for Ferrous & Non-Ferrous Metals.
It has both testing discs, and whatever that clear piece is, that may be a coating thickness to test with the discs?
*** NOT INCLUDED: USB cable ***
RECOMMEND New batteries - original batteries still in the plastic wrap are included.
I'm not sure how charged they are.
This item has been in storage for a while.