UV flashlight can help you see your pet's urine in carpets and furniture. No need to clean the whole house, just shine the UV lamp and the stains will be visible, ideal for easy cleaning. . UV flashlights can also help you detect counterfeits and reveal hidden ink on passports, money or other important documents. It is also an indispensable tool for law enforcement, postal inspections, customs, medical personnel and scorpion hunting. . Direct exposure to the UV flashlight is harmful to the eyes. UV rays are strong and have a lower frequency than X-rays. Do not look directly into the light. The lamps are powered by 3 AAA batteries (not included). .