Pet Urine Locator Black light finds invisible urine. Mini light clearly reveals urine, feces and cat spray invisible to the naked eye. Works on carpet, flooring, concrete, walls, bedding, mattresses and furniture. Super bright LED Black light. Use while standing and walking around areas of home or in car. Must be used in darkness. Detects Old & new stains. Under the UV/LED urine will glow. Before using fill a plastic bag with tiny pieces of paper or coins and outline found glowing areas. After turning the lights on, you will have the areas marked to treat. • This black light is tiny but effectively reveals pet urine deposits You"ll quickly discover urine deposits in areas you thought your pet would never go You"ll be able to spot old urine deposits that may be the reason you have odors or your pet keeps urinating in a particular area • Using a black light in a darkened room will make any urine stain glow You will know where to clean and not waste liquids • Tiny light is at the correct wavelength to see invisible urine from mice to Elephants Can be used indoors or outdoors