UrineVision #1 Pet, Dog, Cat, Urine Detector is the Most Powerful UV Black Light With 51 Ultra Bright LEDs to Allow You to See Even the Smallest Spots That May be Missed on Rugs, Curtains, Furniture, and Walls By Other Smaller Lights. GUARANTEED Best, BRIGHTEST 51 UV LED LIGHT. finds the smallest stains from dog, cat, and other rodents that other less powerful 12/15/or 21 UV lights miss. 3 Duracell, (not generic) batteries included Multiple uses, take it with you when staying in hotels to inspect bedding and furniture. And for those of you in the scorpion states, TX, AZ etc, they cannot hide from this baby. Also can detect counterfeit money, fake ID's, fake nail gel, equipment leaks, and much more. Lifetime guarantee. 395-400nm You don't need yellow glasses or complete darkness to see most spots with this light