Stylus® UV LED Flashlight - Black Powered by 3 "AAAA" batteries. Runs up to 60 continuous hours. Momentary blink and constant "on". Ultra-violet LED for leak detection. Streamlight UV flashlights are essential tools in the fight against terrorism, fraud and forgery.As forgers and counterfeiters become more sophisticated, officials are finding new ways to create fraudulent-resistant documents. One of the most effective methods is to imprint hidden ink which is extremely difficult to reproduce and is only detectable by using ultraviolet light.All states will soon incorporate such images in their driver`s licenses. They are also used on credit cards, vehicle registration cards, currencies, checks, and other important documents.Once these new documents are in place, it will be up to those of you on the front lines to identify the fakes, frauds and forgers. Streamlight’s Ultraviolet lights will provide invaluable assistance.When you shine a Streamlight ultraviolet flashlightlight on a document with hidden graphics, you`ll see the "invisible" graphics. If no image appears, you will know instantly that the document is fraudulent. Streamlight ultraviolet lights are also used by medical examiners to quickly detect the presence of proteins at crime scenes.