Use our light up pen to write illuminated verse or for writing in the dark or lighting up your purse. Simply put, our blinking pen rocks. Each one comes complete with a clear gift box. ; NOTE: Speed of image may differ from actual light pen. Image is a close representation of this light pen's rainbow function. Item Dimensions: Length: 5.9 in. , 14.98 Width: 0.8 in. , 2.03 cm. LED Colors: 1 Blue, 1 Jade, 1 Red Ink Color: Black Includes and Requires 3 AG10 Batteries.