Pocket Size UV invisible marker pen with UV pen cap. Messaging fun, security marking, and a million and one other uses.

Perfect for identification marking, wall decoration, and other stealthy security uses. Glows an incredible bright blue. Ink is totally invisible, won't wash off, and is only visible under blacklight. Solvent based and not recommended for use on the skin. This is the pen you want for permanent invisible marking.

Features:

• 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 read it.
• Other hundreds of uses that are both silly and sensible.
• Handle Color: A mix of fun colors  (our choice)