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WORKPRO UV Flashlight Black Light, 365nm UV Rechargeable Flashlight, Small Portable Black Light for Pet Dog Urine, Stains Detection/Resin Curing/Fluorescent Agent LRYXYY this chalk string line markerAbout this item Upgraded 365nm Powerful UV Light: Featuring upgraded UV LED bulbs with a 365nm wavelength, this UV blacklight flashlight effectively detects fluorescent substances or invisible stains, such as pet urine stains on carpets and clothes. The UV light can also cure resin, reveal hidden cracks, verify currency, and more, offering versatile functionality. The use of the UV flashlight is significantly affected by environmental factors. Please