LRX-200GREEN Rectangular green lighted magnifier with 3x magnification with 2"x4" rectangular lens that provides clear sharp image and a wide field of view for easy map & chart reading and night preservation. (Lens Available with or without 5x bifocal lens) Equipped with a replaceable green wavelength hi-intensity bulb to help preserve night vision and provide maximum contrast with aviation charts and their magenta colors. Uses two "AA" batteries. Made in USA