Ultra-Violet - This UV flashlight with UV (Ultra-Violet) waves has LEDs. It can make even minute traces of dye appear Portable to Carry: This UV lamp torch is very compact and lightweight, you can put it in your pocket, bag or anywhere. Safe to Use: This UV torch can help you find fluorescent whitening agent in baby clothes or your cosmetics, guaranteeing safe from fluorescent agent. It will show purple light towards items that do not contain fluorescent whitening agents; It will show blue light towards items which contain the fluorescent bleach. Practical life function: this black light flashlight can be used to identify authenticate, counterfeit money, driver’s license, credit cards, checks, government IDs, passports, perfect for revealing dry dog, cat and rodent spots and unfavorable spots that the Naked Eye might not see.