Are you a detective on the hunt for evidence or reading secret messages? You always need the right tools! Ultraviolet light is a must - have as it helps you uncover many hidden clues. With this high - tech device, you can exchange top - secret info with friends and fellow agents. The pen uses special ink that's invisible until it meets the ultraviolet light from the flashlight on the other end. Use the UV light to find other glowing objects and materials too. Key features include writing and deciphering invisible secret messages, using the UV - ink pen to write and then reveal messages with the UV flashlight, exploring UV - reactive substances like banknote security features, and it comes packed in a durable metal tin.

Using this Spy Labs set is easy. First, take out the pen from the durable metal tin. To write a secret message, just use the pen like a normal one. The ink will be invisible to the naked eye. When you or your friends want to read the message, turn on the UV flashlight at the other end of the pen, and the message will appear. You can also use the UV light to check out other cool things, like the security features on banknotes. Remember, keep the pen away from small children as the ink and UV light are not toys. Also, don't look directly into the UV light to protect your eyes. To maintain this product, store it in the metal tin when not in use to prevent damage. If the pen runs out of ink or the battery in the flashlight dies, replace them as needed.