This lightweight sight is ideal for all types of shooting, especially close in/ Perfect sights for pistols, shotgun, when turkey hunting, bowhunters, crossbows and air rifles. Turn on the sight and a small Red Dot (4 MOA) appears in the center of your scope, 11-position click rheostat to adjust the brightness. Field of view in feet @ 100 yards: 88'; length: 3.8"; weight: 5 oz; eye relief: unlimited.