UV Spy Pen Ultraviolet Invisible Ink Security Pen (Blue) UV LED Flashlight

Description

These ultraviolet pens are ideal for marking currency or personal property, writing covert "invisible" communications, taking sensitive notes, etc. The markings remain invisible until examined under the ultraviolet light source. Its 8 ultraviolet LEDs are housed in an aluminum body and produces more ultraviolet light than most ultraviolet incandescent or fluorescent bulbs.