Brilliant 21 LED UV Flashlight, LED Ultraviolet Black light & FREE BONUS key ring - Protect expensive carpets, upholstery/fabric furniture & rugs from smells and stains caused by pet urine - never miss a spot again &ndash; not visible to the human eye. The UV Flashlight can be used to find pet urine on carpets, blankets, furniture and other places not visible to the human eye. It can be used to check for false paper money. The light is strong enough to help curing nail gel if needed. Hidden repair work can be discovered during UV inspections on various places. Oil and gas leaks can be detected with the UV Flashlight when leak detector is used.