Daemson Invisible Ink Pen, Spy Pen

Versatile Uses: Ideal for birthdays, parties, Christmas, Halloween and various occasions, these invisible ink pens with UV light add excitement to riddles, treasure hunts, and themed events..Engaging Design: Explore the excitement of invisible ink pens that are invisible in regular light but unveil vibrant messages under UV light..Package Contains: The package includes 3 invisible ink pens, each measuring approximately 14 x 1.5 cm (5.5 x 0.6 inches) and featuring blue, pink, and yellow ink. Additionally, it comes with 3 compact UV LED keychain lights (approximately 4 x 2.3 x 0.5 cm) for various uses..Currency Detection: The compact LED keychain UV black flashlight also serves as a currency detector, revealing hidden strips on different currencies, including major ones like USD, RMB, EUR, CAD, INR, GBP, and others..Intriguing Writing Tool: Spark your creativity using these light-enhanced pens to create hidden messages on various surfaces such as paper, fabric, and skin..