Ultraviolet - This UV flashlight with an ultraviolet (ultraviolet) wave of 395 nm has 9 LEDs. It shows even the smallest traces of dye PORTABLE AND PORTABLE: This UV light flashlight is so small and light that you can carry it in your pocket, bag or anywhere; and it measures only 8.6 cm. Safe to Use: This UV flashlight can help you find fluorescent lighteners in baby clothes or makeup, ensuring they are not affected by fluorescent agents. It will glow purple on items that do not contain fluorescent bleach; it will show blue light on items that contain fluorescent bleach. Practical Lifetime Features: This black light flashlight can be used to identify genuine and counterfeit money, counterfeit money, drivers licenses, credit cards, checks, government ID cards , passports, and is ideal for revealing the dry parts of dogs, cats, rodents and invisible. bad places with the naked eye. Tips for Use: It can be used in humid environment or light rainy days, do not throw this UV flashlight directly into water or other liquid; if the UV flashlight does not work, you need 3 AAA batteries (no batteries, you need to prepare 3 AAA batteries yourself).