Mode: Output / Runtime High: 180 lumens / 23 minutes Low: 5 lumens / 12 hours Description: The i1R 2 Pro is the ultimate keychain flashlight. It has a cylindrical design and a reliable twist mechanism. You can't screw the cap all the way off, when the threads disengage, a catch mechanism ensures you will never lose your light. This model is constructed with titanium Damascus. Olight Flashlights are high-end and high-power flashlights.