Finally, there?s a way to read star charts and guidebooks at night without fumbling with a flashlight or dealing with horrible reflections off the page. LightWedge Night Vision lights up your chart or logbook with a soft red LED glow. The result is an illuminated page without the glare that handheld red flashlights tend to create. Two brightness settings allow you to select the right amount of light for comfortable reading. Requires four AAA batteries (not included). Fits most books.