·FIND INVISIBLE STAINS - The human eye has a limited range of vision. And this black light pen can help you view some stains that are invisible to the naked eye. UV light can cause some stains that we can't see to fluoresce. So this mini UV light can help us to see dry stains in sofas, carpets, clothes, bed linen, and bathrooms. A good helper for household cleaning.

·PET URINE DETECTOR LIGHT - Ultraviolet light can react with some of the chemicals in pet urine and at the same time cause the urine to fluoresce. With this uv pen light, you can free your nose while searching for your pet's urine. You'll be able to spot urine stains and housetrain your pet as soon as possible after a pet accident.

·WATERPROOF & VERSATILE USE - Waterproof material and sealed design make this black light flashlight that can be used in rain, snow, or emergency situations. In addition to checking for stains, this small black light can authenticate currency and official documents, whiteners in cosmetics, find scorpions, and bugs in the garden, lost golf balls, Collect Uranium and fluorescent minerals, and make resin-cured swag!

·LIGHTWEIGHT & CLIP DESIGN - This UV light for resin is 5.1 inches long, 0.6 inches wide, and weighs only 2.2 ounces. Great for handheld and one-handed operation. It just takes up small space for putting in your pocket, handbag, toolbox, drawer, or car compartment. The pen clip design is more convenient to carry. You can clip this small black light flash light on your belt, on your collar, in your pocket and more!

·STURDY & SAFE - The aluminum alloy shell makes this UV black lights corrosion and rust-resistant and exceptionally sturdy. This blacklight pen has short-circuit protection. And it uses very low-frequency UV light(UVA). So you can use it with confidence. Powered by 2*AAA batteries(Not Included). If you do not use this light for a long time, please remove the batteries to prevent wear and tear.