This dual-detector pen includes a test for paper and UV test for security strips. Its LED bulb is specifically designed to reveal the hidden security stripe in all bills $5 and greater. It also uses patented ink to test paper fibers for authenticity.
Three LR-44 batteries are included to supply enough power to check thousands of bills. An instruction booklet is included highlighting the location and color of security stripes. This device also works to authenticate passports, credit cards, traveler’s checks and drivers’ licenses.