Features of the Black Diamond Storm 400 Headlamp Emits up to 400 lumens on max setting PowerTap Technology allows instant transitioning between full and dimmed power Brightness memory allows you to turn the light on and off at a chosen brightness without reverting back to full power Regulated for constant light output Compact, low-profile design Uses four AAA batteries Settings include full strength in proximity and distance modes, dimming, strobe, red, green and blue night-vision and lock mode Multifaceted optical lens design Waterproof and dustproof: Sealed housing withstands immersion over 1m for 30 minutes