Twenty flashlights in one! Each LED features 4 levels of output intensities: Low, Medium, Medium-High, High, plus a Strobe function. One switch for On-Off, dimming and mode selection functions. Pull-to-turn locking rotary color-selector knob with tactile indicator for easy operation with gloves. Double click button to initiate strobe function from “Off” position. Push and hold button for light output levels from “Off” position. Designed for extreme temperatures (-40°F - 150°F). High-impact, super-tough nylon case; drop-test verified from 30 feet. Unbreakable, gasket-sealed polycarbonate lens with scratch-resistant coating. O-ring sealed for waterproof operation. Meets MIL-STD-810F, Method 512.4. Tethered tailcap to prevent loss. Articulating 185° rotating head