This dot sight has red and green dot with 5 brightness settings. Its water proof and shock proof so perfect for hunting and competitive shooting with rifle, shotgun, pistol and crossbow. Bonus dual fit; this fits both weaver / picatinny rail (20-22mm) or dovetail rail (13-17mm) by simply switching the base side plates around. Bonus; flip up end cap covers. Kit includes; 1x30 dot sight flip up end cap covers Alen wrench windage & elevation adjustment Cleaning cloth User manual CR2032 battery (included but not warrantied).