1、LED LIGHT SOURCE: The LED chip light source used in this UV flashlight, instead of ordinary diode lights, has a large light strength and is a UV flashlight for many professional purposes. 2、RECHARGEABLE: The UV flashlight is powered by 1 18650 lithium battery (not included), with a USB Type C charging port, which can be recharged and used, saving energy and environmental protection. 3、UV FILTER: This 365nm black light UV flashlight's UV filter blocks unwanted visible light but maximizes transmission of pure 365nm UV light. This is the purest UV. 4、BLACK FILTER OPTICAL LENS: Filter out the outside light, make the UV more pure and more powerful. Useful for finding dog urine, drying stains, finding scorpions, detecting AC leaks, and more. 5、PREMIUM MATERIALS: The ultraviolet blacklight detector features a high strength aluminum alloy housing, which is highly protective, impact resistant, durable, and lasts longer.