The DLB140R is not only a red dot scope, but it has an integrated red laser on the side. This adds sighting options not found on other red dot sights. It features a black anodized aluminum body, unlimited eye relief and field of view, integrated quick release 3" weaver-style mount. The side mount external<5mW laser sight is fully adjustable with beam power of 635-655 nm. The sight and laser can be used together or individually, and are powered by CR2032 lithium batteries.