At first, I wrote, "It's a black light. It's small. It's inexpensive. It's sort of cool. Did it show me where the cat pee was? No... but it's still small, inexpensive and sort of cool. It is what it is" but now?
I'm impressed! I KNEW my cats had peed on a chair, was peeved that the light wasn't showing me where it was. Finally, it occurred to me to run the light UNDER the chair... this thing really works! Found the pee, cleaned it up, smell gone. Great little product, great price. Would change my review to 5 stars, if I could.