Dri-Mark Counterfeit Money Detection System, UV Light; Watermark Detector; Color Change Ink, U.S. Currency, 0.8 x 0.8 x 6, Black/Green

Powerful yet compact ultraviolet penlight reveals UV-sensitive security markings on 1996 series or newer U.S. currency denominations greater than $1. Counterfeit detector pen uses a chemically sensitive ink to detect bad bills by marking a line on the bill; if the mark turns dark, the bill is suspect. UV light also works on many foreign currencies, major credit cards, passports, traveler’s checks and more.