The open design of this red dot sight from Element allows you to maintain a good overview of your surroundings. The housing is made of a hard durable plastic material which ensures a light weight of the reflex sight. The brightness can be adjusted with 9 different levels. The metal mount makes it possible to mount the reflex sight on any standard picatinny style rail. The reflex sight works on 1x CR1/3N battery (these are not included).