21 ULTRAVIOLET LEDS: Spot pet urine stains to remove the stain and odor source that is in your home. USE TO FIND THE SOURCE OF THE ODOR: Spot Spotter HD can be used on carpets, rugs or furniture material to find sources of pet odors in the home. ELIMINATE ODORS ONCE AND FOR ALL: Once the source of the odor has been found using the Spot Spotter HD, use the Simple Solution Urine Destroyer to eliminate pet odors. BATTERIES INCLUDED: The Spot Spotter HD comes with three AAA batteries for easy use around the home. MAKE PET CLEANING EASY: The Spot Spotter HD makes urine glow in the dark, so you can destroy those pesky odors once and for all.