The NVG-ALPHA is crafted from a combination of polymer and aluminum, this housing strikes an optimal balance between durability and weight, featuring resilience without unnecessary heft. The housing also appears to avoid chasing weight savings by not cutting out features like in other designs. Key Features: Robust aluminum hinge design Variable gain with all Photonis tubes and some NNVT tubes Gain memory remembers gain settings even when turning device off and on Individual pod shutoff when articulated (feature can be toggled ON/OFF) Automatic shutoff when flipped past vertical (feature can be toggled ON/OFF) 2 minute idle shutoff mitigates damage from devices being left on when not in use (feature can be toggled ON/OFF) Intuitive and ruggedized interpupillary stop design redirects all impact forces inwards into a reinforced aluminum plate Powered by single CR123A battery Optional remote battery pack with external 4 pin Fischer port Mount compatibility for remote power: Wilcox G24 Lite, Wilcox G69, Cadex Low Profile Flip Up, Argus A4 Build Kit Includes: NVG-ALPHA Housing 2x Light Pipes 2x Tube Locking Rings 2x D-Collars with Set Screws Specifications: Construction: Polymer and AluminumPower: CR123A (~20 hours) or External FischerOperating Voltage: 1.2-5VOperating Temperature: -51°C to +49°CIR Illuminator: On BoardManual Gain Control: Compatible with EGAC Pigtail, 3 Plate MX10160, 4 Plate MX10160Weight: ~195g Housing Only, ~470g with RPO 3.0 Lenses and Lightweight Diopter, ~560g with BrightPath Solutions MIL40 Lenses, ~595g with Noctis/Fujinon LensesShock/Drop Resistance: meets MIL-STD-810G Transit DropWater Immersion: meets IP68, 2 Meters for 1 Hour Origin:Housing Components Made in ChinaAssembled in Canada