Invisible Writer. 2 in 1 Black Ink and Invisible Ink Writer. Write a secret message or use the regular black ink pen, this pen does it all! This invisible ink pen lets you write messages without leaving a trace. Use the pen''s embedded black light to read what you wrote. Kids love using this for writing secret notes or for diaries. Measures 5" Long. 3 x AG10 (LR1130) Batteries included. Features ink made of special high-brightness compounds that are invisible to the naked eye, but magically illuminate when exposed to a blacklight. Conveniently located on the opposite end of the pen, the blacklight allows you to read any marks that you have made.
- Write your secret message-no one will be able to see it without the pen cap light
- Includes both invisible and regular black ink
- Requires three AG10 batteries-Included