2 In 1 Uv Graffiti Black Light Invisible Ink Pen Marker. FEATURES: This 5" Fine Point Marker, is Loaded with Special Ink That is Only Visible Under UV Light. It Includes a Mini LED UV Black Light with Batteries, So You Can View Your Messages. Kids Love Them for Writing Secret Messages and Notes to Each Other, Students Can Highlight Text Books and Still Sell the Book when They Finish Their Coursework. You Can Mark Your Personal Property with Your House Number and Zip Code in Case of Theft. Push the Button to Open the UV Light for Viewing Your Invisible Messages. SPECIFICATIONS: Type: Ink Pen Cover Material: Plastic Refill Color: White Pen Color: Purple Size: 13cm X 1.8cm or 5.12'' X 0.71'' (Approx.) Notice: The Words Written by It Can't Be Erased,it Doesn't Have 2 Heads. PACKAGE: 1 X Invisible Ink Pen . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.