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).NcSTAR Tactical Quick Release Flashlight/Green Laser Combo that is designed to mount directly to a pistol, rifle, shotgun, or any other device that is equipped with a Weaver Style/Picatinny accessory rail. Feature: 3 W ultra bright 200 lm Cree LED flashlight and green laser combo unit with quick release weaver/picatinny type mount Mounts onto most weaver/Picatinny/pistol accessory spec rails Ambidextrous momentary or constant-on switch Rear selector mode switch: for laser only, flashlight only, or both flashlight and laser modes Ultra-bright LED with 200 lm peak output, updated now with Cree LED International orders will not include batteries