The JacobsParts Black Light Flashlight is a versatile tool that can help you identify hidden stains, counterfeit money, and even minerals. The 395nm wavelength makes it easy to detect pet urine, food stains, and bed bugs on carpets, clothing, and upholstery, and it can also be used to authenticate documents like passports and driver's licenses. With an IPX4 waterproof rating and a special texture design to prevent slipping and dropping, this black light flashlight is easy and safe to use in any environment. Made with high quality aluminum alloy material, it is built to last. This black light flashlight requires 3 AAA batteries, and is backed by a 1 year warranty.