Wonderful
I'm sure glad my owner found this ultraviolet urine detector. This light worked really great on detecting the urine in our carpet. The light shows a large enough area. If you have never used one before make sure the area/room is dark for the urine spots to show up. I highly recomend this ultraviolet urine detector for any pet or child/adult.

Works pretty well
This little blacklight does its job pretty well. You have to hold it at most 2 feet away from the floor, to be effective so you have to either bend over or crawl around. It highlights things pretty well on every surface we tried (carpet, counter top, laminate hardwood, porcelain). Whatever you do, do not take this thing into the bathroom. Unless you clean every nook and cranny daily, you will be disturbed by what you see!

Great product
I received this product today, and it worked great. First, the room must be dark. If you have light carpet, it is tricky at first to see anything. It worked best for me to angle the light slightly instead of aiming it straight towards the floor. On dark carpet, urine and other things were very easy to spot. The light takes 8 AA batteries (not included)or an adaptor plug, but it was brighter with the batteries.

It certainly works!
I'd purchased another, cheaper blacklight "stain detector" from American Science and Surplus and it was completely useless. I guess you get what you pay for. I took a chance on this one - it's not all that expensive, either - and I'm so relieved (and disgusted) that it works very well!

NOTE: It is quite jarring to discover the glowing evidence of formerly invisible spills, splashes, and deliberate markings.

My son was so alarmed at all the drips and spots that fluoresced that he ran to put his slippers on! Clearly, many of the spots were from non-cat substances (bleach and detergent dribbles along the side of the washer, an old coffee spill on the office chair), but I feel confident that I can attack and eliminate all the offensive spots now that I've found them. Buy one for your pet-loving friends, too.

Black light
Works as advertised. I used an an older 12v adapater that I had. The room needs to be dark in order for it work best. I have not tried it with batteries yet. It helped us to find and eliminate some odor spots that we could smell but couldn't quite get. Be sure to use an enzyme based cleaner.