Introducing the Luminous Light Pen Invisible Ink Magic UV Light Money Detector Pen 2 In 1 Combo, perfect for all your writing and money detecting needs. This pen features invisible ink and a UV light, making it ideal for secret messages and detecting counterfeit money. Its luminous design ensures easy visibility in low light conditions. The pen is perfect for use in the office, at school, or at home. Its sleek and compact design makes it easy to carry around in your pocket or bag. Trust this pen to provide you with a smooth and effortless writing experience.