Gudetama Light-Up Ballpoint Pen 2019 Illumination Christmas Opened for photography purposes. Reflections make it appear to have uneven coloring, but this is not the case. Pen length: Approximately 18 cm LED plate: Approximately 3.5 x 2.5 x 0.8 cm Ink: Black With cap The light turns on in red, green, and blue when the mascot is clicked. Penlight Gudetama