TONI SYSTEM Red Dot ZR6 6MOA #ZR6OPT

Red dot size 6 MOA
Dimensions: 51x28x33 mm  
Lens: 25x22mm
Maximum elevation: 120 moa  
Maximum windage: 70 moa
Illumination levels: 10  
Parallax free at 70 meters
Anti-reflective lens  
1x Zoom 
Shock resistance 1000G
Battery CR2032 included
What is an MOA and how to choose the red dot  https://www.tonisystem.it/index.php?id=5&articolo=21