The NVB3-WPT is a medium range Night Vision Bi-ocular. The NVB3-WPT combines a high quality image intensifier tube with a two eyepieces that lets the user comfortably look through the unit with both eyes. The NVB provides the user with excellent resolution and a wider field of view then other units.Features:- Detachable Long Range infrared illuminator- Multi-coated all-glass optics- Built-in Flood infrared illuminator- Adjustable Interpupillary Distance- Water and fog resistantSpecifications:- Total Darkness IR System: Yes- "SMART" Technology: No- Multi-Purpose System: No- IIT Generation: WPT- Photocathode Type: Multi-Alkali- Resolution: 45-54 lp/mm- Signal to Noise Ratio: 18-24- Figure of Merit- MTTF - Mean Time Before Failure: 10,000 hours- Magnification: 3x- Lens System: F1.5, 70 mm- Proshield Lens Coating: Yes- FOV: 14- Range of Focus: 5 m to infinity- Diopter Adjustment: -6 to +5- Controls: Direct- Automatic Brightness Control: Yes- Bright Light Cut-off: Yes- Automatic Shut-off System: Yes- Infrared Illuminator: Yes- IR Indicator: Yes- Low Battery Indicator: Yes- Power Supply: 1x3 V CR123A type battery- Battery Life: 60 hours- Environmental Rating: Waterproof- MIL-STD-810: No- Operating Temperature: -40 to +50 C- Storage Temperature: -50 to +70 C- Dimensions: 212 x 150 x 75 mm (8.4" x 6" x 3")- Weight: 0.82 kg / 1.8 lbs