SUPER BRIGHT & LONG LIFETIME51 LED UV Blacklight Flashlight Portable DetectorReveal an invisible universe with UV black light.Whether you're controlling a pest problem, verifying the authenticity of documents, revealing hidden pet stains in your house or hidden messes in a hotel room, our powerful light offers economy and strength in one compact design.How does it work?The UV black light works by showing phosphors,a substance that emits a visible light because of rediation. Since the naked eye cannot see them,we are reliant on help to spot them,the UV flashlight makes this possible.Q:Does this item can detect cat'urine?A:Yes it does .Q:Does this work for bed bugs ?A:Yes, the UV flashlight can detect bed bugs in the dark environment.Q:Will this device work for finding scropions?A:Absolutely! And it works great.Q:Can it detecte human urine around toilet?A:Yep,this item works excellent on any type of dry urine.Q:Dose anyone use this to detect areas that need cleaning or in hotel rooms?A:Yes! The UV black light works very well for this!Q:Can i use it to find a leak in an air con in my car?A:Yes, but you have to put dye in the freon.Kindly Note:Can only spot dried urine stain. The ultraviolet led black light works best in dark environment, the darker it is, the better it works; If the ultraviolet flashlight does not turn on, please check batteries and battery case whether they are installed correctly(eg. with correct polarity).