About 501B UV LED Flashlight :This UV lamp comes with high light intensity， stable and reliable quality. Using glass encapsulation and nickel plated alloy shell for the Ultraviolet， improve the light-emitting efficiency of Ultra Violet， reduces the attenuation and prolong the service life of Ultraviolet. This flashlight can be used to detect counterfeiting money， counterfeit cigarettes， fakes， fake train tickets， fake cell phone， brand cosmetics with anti-counterfeiting watermark or anti-counterfeiting trademarks and detect fluorescence material. Flashlight type: 501B Light source: UV LED FlashlightQuantity:1 Modes: 1Working voltage: 3.7V-4.2V Body Color: Black Length: 135mm Head Diameter: 30mmTail Diameter: 21mm Net Weight: 90gWave Length: 395-410nm Lifespan: More than 100，000 hoursLighting range: within 50 meters Power Source: 1 x 18650 Battery (Not Included) Features: It can be used to detect counterfeit cigarettes， fakes， fake train tickets， fake cell phone， brand cosmetics.Special needs. (For patrolling， hunting and arresting， inspecting， securing， Martin Rescue as well as Light Shooting and so on)Outdoor activities. (For climbing， camping， seeking survival， walking， diving， fishing as well as hunting， etc.)Professional needs (For Gems-Testing， Mineral-Testing， etc.) NOTE:Please do not put it directly to people`s eyes for the powerful light is harmful and it will make you blind temporarily， especially for the kid Package included:1 x Ultraviolet 501B LED Flashlight (Not included b atteries )