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. The same great features as the original sidewinder compact: lightweight, multi-directional and multi-functional. The difference? it accepts a variety of different battery types to ensure you always have a power source wherever and whenever duty calls. Uses one 3V CR123A Lithium battery (included). also accepts 1 AA Lithium battery or 1 AA alkaline battery. C4 LED, white, impervious to shock with 50,000-hour lifetime. 5mm blue LED, 470 Nm Peak wavelength, impervious to shock with 100,000-hour lifetime. 5mm IR LED, 880 Nm Peak wavelength, impervious to shock with 100,000-hour lifetime. 5mm red LED, 630 Nm Peak wavelength, impervious to shock with 100,000-hour lifetime. Powers on at low output and progresses to high intensity in four discrete steps. Ir safe mode prevents accidental activation and battery depletion while in IR mode. Double-click push button to initiate Strobe (all LED colors have a Strobe function). 185-degree tilting body. Rotates 360-degree on helmet mount. Durable clip attaches to helmet, head strap or MOLLE vest. CORD attachment hole provided in clip capable of supporting 25lbs of load. 3 meter impact resistance tested. IPX7/waterproof to 1 meter for 30 minutes. O-ring and gasket sealed openings. Meets mil-std-810f, method 512.4. Assembled in USA.