White C4 LED, Red Blue & IR LEDs. Sidewinder the most versatile military light in the world. Twenty flashlights in one! Each LED features 4 levels of output intensities: Low (5%) Medium (20%) Medium-High (50%) High (100%) plus a Strobe function (100%) One switch for On-Off dimming and mode selection functions. Pull-to-turn locking rotary color(4) 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. Powered by 2 "AA" batteries. Also accepts 2 "AA" lithium batteries which allow extended operation or extreme temperatures (-40°F - 150°F) Mounts to MOLLE or ACH for hands-free use. High-impact super-tough nylon case; drop-test verified from 30 feet. Battery polarity indicators for easy replacement in the dark. Unbreakable gasket-sealed polycarbonate lens with scratch-resistant coating. O-ring sealed for waterproof operation. Meets MIL-STD-810F Method 512.4. Tethered tail cap to prevent loss. Cord attachment hole supports up to 25 lbs. Articulating 185° rotating head. Spring steel clip attaches to MOLLE or belt. Clip can be mounted on either side of the light. Dimensions: 4.63" High; 2.31" Wide. Weight: 4.96 ounces. Available in Coyote Tan and Marine Olive Drab. US and foreign patents pending One year limited warranty For Battery run down chart see: http://www.streamlight.com/documents/runtime/sidewinder_runtime.pdf