Rex London Secret Agent Invisible Ink Spy Pens

A fun gift, budding secret agents can use these 2 pens to write messages which can only be seen under the pen's UV light.

• Step 1: Write a secret message
• Step 2: Use the secret lamp in the pen lid to read the message

Each pen uses 3 LR41 Lithium batteries which can be replaced by unscrewing the pen lid.

Warning:

• Button batteries are easily swallowed and can cause serious harm.
• Check battery cover is secured correctly before use.
• Keep batteries away from children.