Twist focus. While in flood mode, the light casts a huge circle of light that is equally bright across without any dark spots. In spot mode the light will reach far downrange with a transition halo that allows for a large viewing area surrounding the tight spot beam. Reversible clip. Impact resistant, weather resistant and its LED is virtually unbreakable. 315 lumens, 429 feet and lasts 2 hours and 15 minutes in high mode, 25 lumens, 121 feet and lasts 41 hours in low mode. 4.5 inch length. Uses 3 AAA batteries.