AGM Global Vision Spectrum LRF 4K, Night Vision Scope, 3.5-28X Magnification, 50mm Objective, Laser Range Finder, Multiple Reticles, Matte Finish, Black SPEC50-4K The Spectrum LRF 4K digital day & night vision scope from AGM utilizes many of the features that shooters have come to know and love in the Spectrum-IR, but with one big addition: a 1,000-meter integrated laser rangefinder (LRF). This feature helps alleviate a common issue many shooters find themselves experiencing when hunting with any sort of digital optic, and that is the lack of depth perception that is inherent in optics utilizing a digital screen. The Spectrum LRF 4K pairs that LRF functionality with an advanced high-resolution 3840x2160 detector, which works in conjunction with a high quality 1920x1080 OLED display.