Push the switch and watch Harry's stag patronus appear! Turn out the lights for even more projection fun! MAKES WRITING FUN: Impress your friends with the bright Harry Potter Patronus Projector Pen, which makes writing magical and fun! 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 Patronus Projector Pen will brighten your day for a long time to come. COLLECT THEM ALL: Harry Potter: Dark Mark Projector Pen also available!