This is a red/green dot sight with built in iron sights. It features two brightness settings for both red and green reticles. The scope is built very solidly of full metal and attaches easily to any weaver rail. Having the option of the red/green dot makes this sight more versatile. Red dot is recommended during the day and green dot is recommended at night. Adding a dot sight to your rifle will give you an advantage because you will be able to acquire your target more quickly than using standard iron sights. The required batteries are included.