Ideally suited for situations where depth perception is a crucial factor the dual tube design of D-221B/321B can be configured with variety of image intensifier tubes ranging from Generation II+ to advanced Generation III. This lightweight design offers true stereo depth perception and features built-in IR, Automatic Brightness Control, and Bright Source Protection. The unique, wide exit pupil design eliminates the need for interpupillary adjustment and reduces the size and weight of the unit. With an optional 1x lens kit and fully adjustable headgear, D-121B/321B offers the ultimate versatility in a dual-tube system. Available Accesories: 1x Commercial Lens (requires 2) Commercial Headgear Mil.Spec. Headgear (requires adapter) Helmet Mount (requires adapter) Adapter for Mil.Spec. Headgear/Helmet Mount Long Range IR Illuminator Included: Pelican Hard Case One 3V Lithium Battery Operating Manual Warranty Card |