TGLOE-WF-501B UV LED UV Flashlight + Holster ultraviolet black light + 2 * CR123 battery WF-501 UV LED Flashlight: - Powerful UV LED 3 W with about 395 .. 400 nm wavelength - durable alumin Specifications LED: - CREE MCE 4-cell - digital voltage regulation for input voltage 3.6 to 8.4 V - Powered by: 1x 18650 or 2x CR123 battery Delivery: - 1x LED Flashlight UV - 1 x belt pouch (holster) - 1 x Lanyard (wrist strap) Applications: - Effect light - access control - UV Stamp - Document review - the authenticity of ban