Night Owl Lightweight Night Vision Monocular (4x)br Marine night vision monocular with lightweight water-resistant housing br High-grade all-glass camera-quality objective lens with 4x magnification br 56-foot field of view at 200 feet powerful infrared illuminator for moonless nights br Exclusive steel stringer system for added precision requires 3-volt lithium battery br This item is restricted for sale to the state of California and outside the US br 4x Zoom