The UltraDot Matchdot Red Dot Sight was designed for competition shooting by champion competition shooters. It features 4 different reticle sizes for shooting at different distances and at different types of targets, and the brightness is adjustable via an 11 position rheostat. There is also no need to worry about reliability as the Matchdot is very rugged and can withstand the heaviest recoil. The following accessories are included: Mounting Rings, Bungee Lens Covers, Hex Wrench, Polarizing Filter and Battery.