Now you can locate and eliminate pet stains and odors once and for all! Powerful Urine Gone™ comes with a black light stain detector that will show you areas to treat that are invisible to the naked eye. Spray the right spot and the fast action enzyme action will obliterate stains and odors old and new...forever. Helps prevent dogs & cats from remarking their territory, too! Large 24oz. size lasts & lasts. 61/2” long UV light is made of durable man-made materials & takes 4 AA batteries available everywhere.