With a wide 51 degree field of view, the FLIR MNVD-51 offers enhanced situational awareness without moving the optic. Head, helmet, and weapon mounting options allow hands-free operation while a built-in IR illuminator and flood lens improve vision in complete darkness. 40 hr of battery life is possible with a single AA or CR123A battery.Features:Versatile mounting option-added hands-free functionality for simple head, helmet, and weapon mountingRugged endurance - multi-coated optics and composite housing provide ruggedness and 40 hr runtime with a single AA or CR123A battery allows constant visionSuperior awareness-Wide 51-degree field of view and onboard IR illuminator provides outstanding situational awareness in complete darknessDetachable long range IR illuminatorManual gain controlAuto power offLow battery indicator-6 to +2 diopter adjustmentUp to 40 hr battery lifeLimited 2 years warrantyGen 2+ HD (high definition) MG