READY FOR YOUR NEED-- It's a needed multifunctional ultraviolet light in your life -- Counterfeit documents, banknote, jewelry identification Dog cat urine detection Reveal invisible stains or fluids on the floor or even grass Curing UV resin and green oil Glowing UV painting and etc. WARRANTY!Please contact DARKBEAM for efficient solutions whenever you need and any question will be solved. We provide promptly, satisfying support with 180-Day Money Back One Year Guarantee. MINI BUT POWERFUL ULTRAVIOLET LIGHT-- Small enough to put into your keychain or pocket. There is no doubt that this pocket-size blacklight is a good pick for daily use. Comes with a hand strap, easily put into pocket, backpack, toolbox, your car or beside the couch but not afraid of losing. The case uses high-quality aluminum alloy, which greatly enhanced its heat dissipation performance, this makes flashlights more reliable and reliable. BUILT-IN RECHARGEABLE BATTERY POWEREDThe V4 UV365 Flaslight is powered by built-in rechargeable battery. It can be used continuously for 1h when fully charged. The USB direct charge design allows you to get rid of the trouble of frequent battery replacement. Easily connect the USB charging cable to your adapter (within 5V 1A), power bank, laptop and other USB devices then fully charge the battery in 1-2h. FILTERED UV 365NM LIGHT-- Designed with hard toughened black filter optical lens that can filter out unwanted visible light, and release invisible ultraviolet light, which is suitable for more professional detection needs. More Obvious Detection Effect - There is almost no disturbing visible violet light. UPGRADE UV LIGHT SOURCE-- Made of high-quality light bead, with high power of 1300mW radiant intensity. The 365nm Light is a real invisible uv light that is not dazzling (DO NOT LOOK DIRECTLY AT UV LIGHT!). It doesn't look as bright as 395nm because it is invisible to the naked eye. But when it irradiates items containing fluorescent agents or anti-counterfeiting codes, it will show obvious blue-violet light.