Main parameters: Weight:129 g;Length:82 mm ; 33mm reflex lens aperture provides a wide field of view,capture the target quickly.Quick Red-Green Conversion buttons: There are two buttons written 'on red' and 'on green',Can quickly switch between red and green aiming points.When you need to close, you need to press the two buttons together.Dual illuminated 4 reticle: With 4 reticle patterns illuminated in red or green,this reflex scope offers a total of 8 different sighting options. provide various choices in different occasions.Easy to operate: Equipped with a rail mount base that fits 20 mm rails . Allen head screw type windage and elevation click adjustments , provides easy sight.Water/Fog/Shock Proof: Water-proof, fog-proof and shock-proof properties protect internal components and enhance performance in all weather conditions.