* This 5" long fine point marker is loaded with special ink that is only visible under UV light.
* It includes mini LED UV black light with batteries so that you can view your messages.
* Kids love them for writing secret messages & notes to each other, students can highlight text books and still sell the book when they finish their coursework.
* You can mark your personal property with your house number and zip code - in case of theft and recovery this makes it easy for the Police to return your valuable items.
* It is convenient for you to write some secret to friends and send them out into the black light to embarrass yourself.
* Other hundreds of uses that are both silly and sensible.
* Color: purple