Experience the power that increased illumination can provide to your defensive firearm. Introducing the CMR-208 Rail Master(R) Universal Tactical Light for rail-equipped firearms; a best-in-class tactical light from the brand that you trust for personal protection optics. Instant Activation: Tap-On / Tap-Off 420 (high) or 110 (low) Lumen LED white light High output Cree(R) XPL LED Material: Anodized Aluminum Waterproof up to 1 meter Impact resistance up to 1 meter Modes: high, low, strobe, momentary Battery life: 1 hr 5 min 420 Lumens / 1 hr 50 min 110 Lumens Weight: 4.1 oz with battery installed Fits most pistols, rifles, and shotguns with M1913 Picatinny (or similar) accessory rail measuring at least 1" from recoil lug to trigger guard. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov