The UV 365nm is a uv light with little visible light outside the human visual range until you shine the light at something that fluoresce. The UV 395nm is closer to what you'd think of a run-of-the-mill blacklight it shows a violet light spotlight being closer the visible spectrum.
The dual wavelength flashlight has the function of telescopic adjustment of focus, which allows to cover a larger area. Zoom in/ out to adjust suitable light range. Enlarge the beam to circle the suspected area and narrow down to mark the pet's urine.
Portable size with 5.2 inch Length * 1.1 inch width allows you bring it with you everywhere. So that you can check whether the hotel sheets and pillows are clean during traveling or business. Good waterproof, non-slip and strong aluminum alloy body makes this product durable and long lasting.
Upgraded LED 395nm and 365nm Blacklight helps you find the dog urine, food stains, rocks, scorpions, dirty on carpets/clothes, fluorescent agents, driver's licenses, official ID cards, passports, bank note, amber and jewelry detection.