Practicality: Suitable for outdoor and indoor use, such as hunting scorpions and minerals revealing invisible pet stains, driver’s licenses, official ID cards, passports, etc. Professional UV flashlight produces 395-400nm UV wavelengths with 51 UV LEDs for easy detection of stains or other things 51 UV LEDs provide greater coverage than most other UV flashlights 3 AA batteries not included, you need to buy them separately Package Contents: 1 UV Flashlight product description Made of high-quality aluminum alloy material and 51 LED lamp beads, it is sturdy and durable and has a longer service life. Coupled with the O-shaped design of the flashlight head, it provides effective waterproofing when used outdoors. Best of all, it is perfect for indoor and outdoor use as it has greater coverage, such as hotel room inspections, scorpion hunting, etc. Specification Model: LT-BL5 Material: aluminum alloy Working voltage: 3.7V Bulb Type: UV LED Number of LEDs: 51 LEDs Wavelength: 395-400 nm