Dot can be changed to either Red or Green, multi brightness control. Fits Weaver or Picatinny rail Magnification: 1X Objective Dia: 40mm Field Of View: 68'@100 yards Eye Relief: Flexible Exit Pupil: Flexible Click Value: 0.8 inch (1 click @ 100 yards) Length: 3.8 inches Weight: 6.3 oz Battery type: CR2032