NcStar's Combo consists of a 3W Ultra Bright 200 Lumen CREE LED flashlight and Green Laser Combo unit with Quick Release Weaver/Picatinny type mount. It mounts onto most accessory spec rails. It has an ambidextrous momentary or constant-on Switch, a rear selector mode switch for Laser Only, Flashlight Only, or Both Flashlight & Laser modes. This combo is crafted from aluminum and reinforced nylon and uses 2 CR123A Battery (Included).