Night Owl 2X Night Vision Monocular. Compact, lightweight and LOADED with practical uses! Super-affordable "see-at-night" technology for camping, hunting, wildlife viewing, security and more! It wasn't that long ago that technology like this (originally developed for the military) would have put a major dent in your budget. But the Night Owl 2X Night Vision Monocular gives you an eye-opening after-dark experience for a surprisingly low price!See like an owl:1st generation intensifier tube Built-in columnated infrared illuminator for clear views in complete darkness 2X magnification Durable plastic lens Soft-touch rubberized coating... comfortable grip, enhanced durability Manual focus 24 mm objective lens Resolution: 35 lp / mm on center Spectral sensitivity: 400 nm to 900 nm Diopter adjustment: +4 to -4 Minimum focal distance: 1.6' Angular Field of View: 29 degrees Field of View at 200': 70' wide Requires (1) 3V type 123 lithium battery (not included) 45 to 100-hour battery life (depending on infrared use) 5 1/2" l. x 2 1/4 " w. x 3 3/4" h. 9 ozs.