The JETBeam RRT0-XML was Gear Magazines 2011 "Best Buy" flashlight, and it's not hard to see why. The perfect light for every-day-carry, the RRT0 can be powered by a CR12A battery for maximum performance in the most compact package, or it comes with an optional extender tube which allows it to be powered by a AA battery, a more readily available and affordable option. With an output of 550 lumens with an infinitely variable control ring, and a throw of almost 500 feet, the JETBeam RRT0 is the ultimate EDC light when it comes to power, performance, and versatility!