One of the most popular products available from N-Vision Optics is the GT-14 Night Vision Monocular. The GT-14 has a proprietary ergonomic design that makes single-handed operation easier and more comfortable. The monocular also is equipped with an IR illuminator so that the user can easily read maps and other documents. Features include automatic brightness control. The GT-14 can be used as a helmet-mounted, handheld, or weapon-mounted system. The system is offered with Gen 3, Gen 2+, SuperGen, XD4, or XR5 image intensifier tubes. Battery life is 40 hours on one CR123 lithium.