Armasight Discovery-8x is a rugged lightweight long range Night Vision Bi-Ocular. It combines a high quality image intensifier tube with a two eyepieces that lets the user comfortably look through Discovery with both eyes. Unit comes with included powerful long range IR illuminator which allows you to see clearly even in total darkness. Armasight Discovery-8x is equipped with state of the art Bright Light Cut-Off System which controls the existing illumination level through the photo receiver. When illumination level surpasses 100-300 lx for the following 10 seconds, the Bi-Ocular will shut off automatically. Armasight Discovery-8x is everything an outdoorsman, hunter, fisherman, tactical shooter, law enforcement agency, or military personnel could ask for. Limited two year Warranty