Finally, a high-quality writing instrument that illuminates where you write. The Pilot's Pen, originally sold to the aviation industry, is the world's first LED pen that illuminates where you write and uses a single, common AAA cell. The pen comes packaged with a spare AAA battery and ink cartridge (one blue and one black ink). The Pen's powerful LEDs are rated at 100,000 hours of life and a battery will provide at least 20 hours of illumination. The pen's body is made from black anodized aluminum for durability and has a series of ridges built-in for better control when writing. Operation is easy - press the top button to turn illumination on or off and rotate the top cap to retract or extend the pen's ink cartridge tip. Included in the gift box is a spare red and green transparent tip for use by pilots and aviation users seeking to preserve their night vision while using the Pen. It's safe to carry in shirt pockets and easy to use anywhere or anytime - day or night. Thousands in use worldwide by aviation professionals, US Special Forces, Army Rangers, NATO, first responders, academics, creative arts professionals, night shift workers, hobbiests and many more satisfied users. Lifetime Guarantee - if it ever fails to work, we'll replace it (battery and ink not covered, of course). Makes a great gift.