LED Pen, the Pilot's Pen, LED Powered Ink Penlight Night Writer See where you write at night! Ideal for anyone who needs illumination when writing - pilots, flight crews, doctors, nurses, police, military... Aircraft aluminum housing with push button on/off LED lighting and rotating top cap for pen retraction. Uses one common AAA cell for up to 20 hours of illumination Gift box packaged with an extra black ink cartridge and extra AAA cell (replacement ink is available through us on Amazon - visit our WebStore) Comes equipped with a red-color tip for aviation users seeking to preserve their night vision while using the Pen.