TFSeven&reg; 21 LED UV 395nm Ultra Violet Blacklight Pocket Flashlight for Spotting Scorpions and Bed Bugs, Counterfeits, A/C Leaks and Pet Stains counterfeit money detector flashlight violet light to detect fluorescent substance (Silver) Emits 395 nanometer wavelength, hunting scorpions and minerals. Essential tool for law enforcement, postal inspections, customs, medical forensics, HVAC repair. Battery Required: 3 x AA Alkaline Battery (Not Included) Waterproofing grade:Ordinary rain proof , not used for diving. UV-A flashlight shows hidden pet stains and other unfavorable spots on carpet or clothes