Dri Mark’s patented Tri Test Counterfeit Detector is the first ultra portable, fully functioning counter-top counterfeit detection device based on the newest LED technology. Detects washed bills with powerful UV LED light; a fast and accurate counterfeit detector using the original counterfeit detection pen and backlight: Contains Tri Test Counterfeit Detection Machine and authenticator marker 3 TESTS IN ONE COUNTERFEIT DETECTION MACHINE : PAPER TEST- Authenticator pen tests for genuine currency paper; UV TEST - Checks for embedded security strip on US currency 5 dollars and larger; WATERMARK TEST - Backlight reveals watermarks and other security features on other forms of identification Operates on AC adapter (sold separately) or 3 “C" batteries (optional) Reveals UV security markings on drivers licenses, credit cards, passports, international currencies, cashier’s checks, money orders and more Counterfeiters bleach real US Currency and illegally print higher dollar amounts on smaller bills; the Tri Test checks for more than just authentic paper; UV and LEDs in the Tri Test Counterfeit Detector prevent fraud Dri Mark’s 90 day Limited Warranty from the date of purchase; US Patents 8,531,652 and D 666,5145, NOTE - once turned on the UV light is activated when a bill is placed in the Tri Test Counterfeit Detector