The Sidewinder Compact II accepts multiple power sources: one CR123A lithium battery, one AA lithium battery or one AA alkaline battery to provide ultimate flexibility in the field. It is lightweight, multi-directional and multi-functional. This flashlight has been engineered to meet a variety of hands free task illumination requirements with various color LEDs operable at varying outputs and runtimes. The flashlight features a 185-degree tilting body to allow positioning of the illumination source at the work area. Aviation model includes white, green, blue and IR LEDs. High impact super tough nylon case offers exceptional durability and weather resistance. All openings are O-ring sealed. Unbreakable polycarbonate lens with scratch resistant coating is gasket sealed. Compound On-Off mode selector switch ergonomically separates On-Off,-Dimming-Strobe, and LED selection functions. Design does not require the operator to access separate switching locations on the device. Rubber dome actuator and 4 position pull-to-turn locking rotary selector knob with IR LED tactile indicator provides easy operation even when wearing heavy gloves. This push button switch is lifetime rated to 300,000 operations. Pull-to-turn locking rotary selector knob uses a photonic switch design which requires no mechanical connection. Lithium cells allow operation in extreme temperature environments (-40-degrees Fahrenheit to 140-degrees Fahrenheit). Built in battery polarity protection guards against damage to the light. Meets MIL-STD-810F, Method 512.4. Cord attachment hole provided in clip is capable of supporting a 25-pound load. IPX7 Rated design, waterproof to 1 meter for 30 minutes, and 3-meter multiple orientation impact resistance tested. Includes helmet mount, head strap, CR123A lithium battery, and durable belt or clothing clip with integral helmet mount features. Dimensions: 3.00-Inch long, 1.07-Inch wide, with a 2.04-Inch depth. Weighs 2.4-Ounces with CR123A lithium battery.