Dog Cat Pet Urine Detector-Urine Finder Light 12 LED - UV / Black Light Flashlight Professional Cat & Dog Urine Stain Detector Outperforms Other Pet Urine Detection UV Flashlight Brands Head Diameter 1.375" 38 mm, Body Diameter 1.125" or 27.5 mm Length 3.8" or 94.2 mm, Weight 3.4 oz. Power by 3pcs AAA batteries ( not included) PROFESSIONAL CLEANERS wanting to dominate their industry must get this handy work tool... it finds hidden smudges quickly