ultraviolet light equipped with hard toughened filter optical lens that can filter out visible light, and release purer ultraviolet light for demanding detection needs, more perfect for demanding detection like fluorescent agents & counterfeiting code. It detect more efficiently in darker environments, reveal what is beyond our scope of vision. [PERFECT FOR DETECTING THINGS]The UV light can make the usual fluorescent materials glow: Highlight cat pee, stains or fluids on the floor or even grass; Detect cat ringworm, documents; Verify banknote, driver license, official identification cards, passports; AC leak detection with dye; Activate glow-in-the dark makeup, ink, , uranium / Radioactive glass; Also good at amber and jewelry detection, 3D printing resin curing, Plant worms Exposure. [USB RECHARGEABLE]This UV 365nm Flashlight is powered by built-in rechargeable battery (3-5h runtime, 2h charging time). USB charging port for fast charging and easy availability. Directly via any USB devices such as laptop, power bank, adapter. Color: As Shown Material: ABS Package Contents: 1 x light 1 x usb data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.