The super-versatile Black Diamond Cosmo Headlamp delivers the brilliance needed to light up base camp and beyond. Its single switch lets you toggle between three modes for short- and long-distance illumination. At maximum, two single-power LEDs and one double-power LED emit a powerful 70-lumen beam. On double power, beam reaches out to 33 meters and runs for up to 175 hours. On single power, beam illuminates out to 18 meters and runs up to 150 hours. Its dim control lets you adjust to your lighting need. Compact design seals out water from any angle. Runs on three AAA batteries (included). Wt with batteries: 3.17 oz. Colors: Dark Shadow, Matte Black, Ultra White, Magenta.