This product is a professional design with one cavity containing two highly efficient semiconductor light sources. We combine a white light LED illumination flashlight plus either a Red or optional Green semiconductor laser for pointing. This unique system provides a flashlight and laser pointer in one housing that has a wide operating temperature range. It will quick mount on any Picatinny and weaver style rail. It comes with all accessories you need including a left hand/right hand cable switch and different rail blocks for your weapon. We even include two CR123A batteries for you. This system has plenty of power for your applications. It can function as an LED flashlight only, a laser pointer only as well as both on for a combined LED flashlight and laser pointer at the same time. This powerful system allows instant target confirmation upon flashlight illumination.