5.11 Tactical Unisex TMT R1 Flashlight Aluminum 339 lumens in a sharp beam that's free of hotspots and shadows Intelligent tailCap switch allows quick and silent selection of three light modes - High, Low and Strobe An ideal choice for patrol, duty and tactical operations or personal use Includes back up battery cartridge with two CR-123A batteries Three hours of runtime on High and a 74 hour Low runtime with either Lithium Ion cell or the back up battery cartridge