Gen 3 PVS-14 features a manual gain control which allows the user to increase or decrease image tube brightness for greater image contrast in varying light conditions. Focus 25cm to infinity, lightweight ( 351.53g), 5 year warranty, AA batteries (not included). The Gen 3 can be hand held, head-mounted, helmet-mounted and weapon-mounted. Kit includes all mounts (see photo) and a handy carry bag. Gen 3 PVS-14 is currently the preferred night scope used by the US Military.