Every detective needs the right equipment, as specialized tools are required for every case. A secret code pen is essential for composing top-secret messages. The invisible ink allows the narration of messages that are not recognizable by unintended readers. Only the initiated know that the message can be made visible using the UV light hidden in the pen's cap.

Thanks to the 2-in-1 function, the pen can also be used as a regular pen. The 2-in-1 secret pen is an extremely important tool for all aspiring detectives.

• 2-in-1: pen on one side, secret pen with ultraviolet light on the other
• Built-in ultraviolet light in the cap
• Invisible ink that becomes visible with UV light