Thirsty Rhino Cahaya Black Light 9 UV LED Premium Handheld Flashlight Ultraviolet Pet Dog and Cat Urine Stain Finder with AAA Batteries (Set of 1) Sleek Black Aluminum Construction with Textured Grips and Push Button Activation Includes 3 AAA Batteries with a Battery Blocker Emits 395nm nanometer Wavelength UV Ultraviolet Black Light Used by bouncers to detect fake IDs at nightclubs, bars, clubs. Authenticate money, licenses, ID cards, passports. Easily spot urine & stains of dogs, cats, pets, animals on clothes, carpet, etc.