Nitecore T Series Tube UV USB Rechargeable UltraViolet Blacklight Keychain Light plus LED Keychain Flashlight Incredibly light and easy to carry UV LED with 500mW of power at a wavelength of 365nm Great for verifying currency and ID like driver license as well as germ and fluid detection USB rechargeable with built-in battery, micro-USB port and integrated blue power indicator light Easy single-button user interface. Innovative "Lockout" feature to prevent accidental turn-on (see description for details) Bundle includes a Lumen Tactical LED keychain light so you have both your standard white light as well as your UV light!