Rex London Set Of 2 Secret Agent 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.