The Sightmark® series of Eclipse™ Night Vision Monoculars are multi-functional optics inspired by military and law enforcement applications. The Eclipse 4x50 Night Vision Monocular features a high light gathering capacity and an impressive magnification, making it perfect for observing moving targets at varying distances. A built-in IR illuminator extends viewing capabilities even farther, and is practically invisible to both animals and humans. Its advanced interior electronic system, designed to extend the operation time of the unit, gives the monocular up to 72 hours of constant battery life. With all these features and included accessories, the Eclipse 4x50 Night Vision Monocular is a must-have for any recreational excursion or professional nighttime function. Protected by a three-year warranty on the tube and Sightmark's Limited Lifetime Warranty on the housing, the Eclipse 4x50 Night Vision Monocular is engineered to meet the highest requirements and standards of the serious night vision user.