Brite Strike BTL-150 HLS Basic Series Tactical Flashlight Patented Hi/Lo/Strobe Tactical Touch switch for effortless switching between modes. Max output lumens: 280 lumens. Runtime: 3 Hours (Hi), over 8 hours (Lo), 3.5 hours (Strobe). Battery: Two 123A Lithium (included). Length: 5 inches. 1 year limited warranty.