Invisible ink pen for writing secret messages or passwords. Write down your secret message, wait a few seconds and shine the light of the pen on the message, then your secret message will reveal and the words will appear. Additionally, each invisible pen has a built-in LED that makes it easy to view and read invisible message. D1 Ink refill.

Specifications

• Materials: ABS, aluminum, iron, steel, battery, plastic
• Packaging: card
• Dimensions: 14 x 1,1 cm