The Milwaukee Tool REDLITHIUM USB 2,000 lm Slide Focus Flashlight, No. 2162-21, offers four different modes of Trueview high-definition output, allowing users to maximize output or extend run-time up to 24 hours. Designed with a slide-focusing feature for easy and fast beam control, quickly slide from flood mode into spot mode with ease, giving users the ability to see up to 656'. The multi-functional rear power button offers battery indication, mode selection, and easy access to boost mode. With a simple double press of the button, users can access boost mode at any time, quickly illuminating an area with an extra blast of light when it's needed.