It works by causing the salts that are present in dried urine to fluoresce like violet neon sign, making them easily visible to the human eye, and a breeze to spot clean, saving you hundreds of dollars in expensive cleaners, or the need to replace the entire carpet. The UV light can identify counterfeit money and reveal the hidden ink on passport, money or other important documents like ID card. The powerful UV rays will illuminate UV dye, enabling you to see exactly where the leak is so you can plug it. In Use UV flashlights can be dangerous if a person looks directly into them, because this can cause vision damage. Shining the flashlight onto a reflective surface, such as a mirror, can also be dangerous to eyesight. Note: requires 3 AAA batteries, which are NOT INCLUDED.
