Output is 25 lumens by 3 super bright LEDS that are powered by 4 A76 batteries. Flashlyte is turned on by an ambidextrous switch located at the back. Mount is LaserLyte quick detachable mount with an integrated cross lock bar. Kit includes: black round flashlight body, ambidextrous slide switch, 4 A76 batteries, quick detachable mount with cross bar, tool kit and instructions.