baigish tacticel red dot reflex sights optic scope tactical mini red dot sight with 11mm & 20mm weaver rail mount baigish <p>description:</p> <p>11 brightness adjustment red dot sight.</p> <p>rugged all metal construction</p> <p>multi coated optical lens</p> <p>precision brightness, windage and elevation adjustments</p> <p>suitable for any lighting conditions</p> <p>integrated mount for 20mm and 11mm rails</p> <p> magnification: 1×</p> <p>objective lens diameter(mm): 30</p> <p>exit pupil range(mm): 30</p> <p>field of view @100 yds: 68</p> <p>optimum eye relief (in): unlimited</p> <p>parallax setting: 50 yds.</p> <p>size:as picture</p> <p>weight:</p> <p>fits all 20mm picatinny and 11mm weaver rail.</p> <p> power by: cr2032 battery (not included) </p> <p>due to shipping regulation, all batteries will be removed before shipping. </p>