Push the switch and watch the symbol of Lord Voldemort and his Death Eaters appear. Turn out the lights for even more projection fun! MAKES WRITING FUN: Impress your friends with the bright Harry Potter Dark Mark Projector Pen, which makes writing magical, fun, and mysterious! MULTI-USE PEN: Perfect for Harry Potter themed gifts, school supplies, stocking stuffers, and more! SMOOTH WRITING: This high-quality ballpoint pen with black ink writes smoothly and easily. BATTERY INCLUDED: This Harry Potter Dark Mark Projector Pen will brighten your day for a long time to come! COLLECT THEM ALL: Harry Potter: Patronus Projector Pen also available.