Kit includes 16.9 oz. trigger spray bottle of Urine-Off plus a LED Black Light. The LED black light will locate hidden stains and odor, and then you can immediately clean them with Urine-Off. Urine-Off's bio-enzymatic formula helps permanently remove the pungent odors and stains that are caused by both puppies and older dogs. The mini black light is custom-engineered to locate those hidden, dried uric salt crystals- invisible to the naked eye. The crystalline structure of dried urine causes it to fluoresce a dull yellow-green color under black light. Fixture measures 3 3/4" long. LED Light requires (3) AAA batteries - not included.