With daylight fading, keep the perpetrator in your sights with the Firefield Nightfall 2 5x50 Night Vision Monocular. Featuring a more ergonomic, easy-grip design than other monocular in the Nightfall family, operators can begin their viewing experience within seconds. Equipped with a power-saving PULSE IR illuminator and one of the largest objective lenses available on the market, this Gen 1 night vision monocular is the ideal device for a wide variety of nighttime applications. Its fully weather-resistant design features a modern, rubber-armored housing for exceptional durability. Compact and extremely lightweight, the Nightfall 2 5x50 offers convenient operation during a wide range of uses including nighttime hunting, search and surveillance and general observation. Delivering high quality and reliability to every intense moment, Firefield is the key to victory. Note : Check quality of battery, use new batteries, check polarity, and lastly clean the battery compartment contacts with alcohol.