2 X UV invisible security Marker pen + Built in Ultra Violet LED Light-Pack of 2
Write on MOST surfaces.With built in Ultra Violet (UV) Light.Not visable to the naked eye turn the UV light on the writing appears.Write secret messages and use the UV light to show the writing.Hiding pin numbers or passwords.UV light is also useful for detecting counterfeit bank notes.Suspect someone is stealing cash. Simply use the pen to make a distinguishing mark and use the UV light to make checks.Package included: 1  Invisible Pen(3 BUTTON BATTERIES INCLUDED)