Simple Solution Spot Spotter HD UV Urine Detector Simple Solution Spot Spotter HD UV Pet Urine Detector uses ultraviolet light to reveal dog and cat urine stains on your carpet, bedding, or furniture Using 21 powerful ultraviolet LEDs, the Spot Spotter makes urine stains glow in the dark, revealing hidden urine stains Spot and eliminate dog and cat urine stains at their source that are undetectable to the human eye Use in conjunction with Simple Solution Stain + Odor remover to completely eliminate all traces of urine stain and odor Requires three (3) AAA batteries (included with package)