NiteCore Infilux IFE1 XP-G R5 LED Flashlight - Infinite output ranging from 0.5 to 260 lumen with smart ring control SmartRing II 'Infinitely Variable' digitally controlled brightness system Made from military grade T6061 aluminum alloy for unprecedented durability Mil-Spec type III Hard-Anodized scratch and corrosion resistant finish Premium CREE XM-L LED with a maximum output of 550 lumens Titanium alloy bezel retaining ring provides protection from impacts