Clip On Night Vision System, HD digital night vision monoculars. 984ft Clear Nighttime Viewing Range. Daytime color mode, Night vision mode. The highly sensitive CMOS image sensor featuring 1920x1080 FHD resolution delivers a high definition image with precise detail rendering. Built-in FHD video recording, slow motion mode available, Long Eye Relief (up to 70 mm). This unit fits scope with parallax adjustment. Fixed parallax scope can only work with NV100 in specific distances (100yds for example) at specific magnifications. Please Message Me if You Have Any Questions.