Lepro LE UV Torch, 9 LED 395nm Ultraviolet Flashlight, Blacklight Detector for Stain, Bed Bugs and More, UV Torch and AAA Batteries Included. This flashlight is ideal for detecting pet stains, identifying fluorescent agents in various materials, and finding hidden marks. It features 9 LEDs with a 395nm wavelength for effective UV light emission. The package includes 3 AAA batteries, so you can start using it right away.