HOPDAY Powerful UV Flashlight Black Handheld 390-410nm wavelength 12 Ultraviolet LED Lights For Home and Hotel Inspection Perfect Pets Urine and Bed Bug Detector With 3 AAA Batteries

What is ultraviolet light?
Ultraviolet light is a type of electromagnetic radiation, as radio waves, infrared radiation, X-rays and gamma-rays. UV light, which comes from the sun, is invisible to the human eyes.
Pet stain detector
Rather than vacuum the whole house if a pet has made a mess, open the UV flashlight and the stains will show on your carpet, which makes for a much easier clean up.
More functions
In addition to spotting urine stains from pets, or identifying fake ID'S. You can use the UV light for postal and custom checks, for inspect hotel rooms, for detect scorpions at night, and for show UV dyes when looking for fuel or gas leaks.
Notes
1. If the ultraviolet led flashlight does not turn on, please check batteries and battery case whether they are installed correctly (e.g. with correct polarity);
2. The ultraviolet led black light works best in dark environment, the darker it is, the better it works;
3. Can only spot dried urine stain;
4. Does not work on reflective surface or carpet with fluoresce, and not work well on cat urine;
5. For few dark color carpets, the reflected stain color will be very close to the color of the carpet, making it harder to see;
6. Remove the batteries if unused for a long time
Caution
1. Not waterproof, please keep away from liquid or moisture;
2. Do not shine directly into eyes;
3. Keep it away from children.