The FD-1 is designed to easily transform every existing optical scope into a high definition night vision scope. Now you can see and execute accurate shots in complete darkness. 1920x1080 CMOS Sensor Integrated Laser Range Finder Multiple Illumination Levels Quick Detach Adapter The quick-detach adaptor is included with the FD-1, allowing you to easily transition between your existing traditional optical scope and night vision on only seconds.