Black Light UV Light Flashlight 21 LED 395nm Ultraviolet Blacklight Flashlight Mini Pet Urine Detector for Dog/Cat Dry Stains Resin Curing Matching with Pet Odor Eliminator(Batteries are Included)

How Does It Work? Vansky Black Light UV Flashlight is special 395 nanometer wavelength of UV light the special structure of certain molecules can be excited by this violet light to emit different colors of fluorescence. Such as pet urine scorpions fluorescent powder invisible ink. What's in the box? 1 x 21 LED UV Flashlight 3 x AA Alkaline Battery 1 x User Guide Features: Waterproof Level: IPX4 Voltage : 4.5V Material : Aluminum Alloy Long Running Time : 5+ Hours on Full Battery Notes: -Can only spot dried urine stain; -Does not work on reflective surface or carpet with fluoresce; -The ultraviolet led blacklight works best in dark environment the darker it is the better it works; -For few dark color carpets the reflected stain color will be very close to the color of the carpet making it harder to see