BLACK LIGHT Main function: identify the world notes true and false, identify id, the bill is true or false. BLACK LIGHT Detector portable hand-held lights here, put 4W UV lamp, electric lighting in the top with beads. To do with a flashlight. Easy to carry, compact and practicalidentify the type:1 the RMB, foreign currency, passport, ID card.2, bank drafts, checks, Peony Card, the credit card.3, ...