DESCRIPTION AND FEATURES The AGM NVG-40 is a dual-channel night vision system. With a 40Adeg field of view, it provides a large visual field without needing to move the binoculars. The NVG-40 uses advanced multi-coated optics and is built to last with a compact composite housing. Operating from a single AA alkaline battery or CR123A battery, the NVG can run up to 20 hours. Also equipped with an integral infrared illuminator for reading in the dark.For hands-free use of the NVG, it can be installed to many various mounts, such as the AN/PVS-7D, AN/PVS-14, AN/PVS-7A/C, AN/PVS-15, and AN/PVS-18 mounts, or to the mounts with mini-rail interface. NVG Interface Shoe (preinstalled) is used for installing the NVG to a either standard dovetail type headset and helmet mount. Bayonet/Horn Interface Shoe (included) is used for installing the NVG to a either standard bayonet/horn type headset and helmet mount. NVG Interface Shoe with Connector (optional) is used for installing the NVG-40/NVG-50 to either standard dovetail type headset and helmet mounts and connecting the Battery Pack. Mini-Rail Interface Shoe is used for installing the NVG to the mounts with mini-rail interface. Mini-Rail Interface Shoe is included to the optional AGM Goggle Kit W and AGM Helmet Mount Warning: California&';s Proposition 65 Redundant dual-tube design True stereoscopic vision Lightweight & compact Head or helmet mountable for hands-free operation Bright light cut-off Ergonomic, simple, easy to operate controls Built-in Infrared illuminator and flood lens Utilizes single CR123A lithium or AA battery Limited 3-year warranty Package Includes: Night Vision Goggles, Soft Carrying Case, Lens Cloth, Battery Adapter, User Manual Battery Life (Operating):Up to 20 hours at 20AdegC (up to 80 hrs with optional battery pack) Field of view cleanness by zone: Gen 2 IIT NW1 is the highest resolution and the cleanest offered by AGM. There are practically no visible spots in Zone 1.