From the manufacturer

When you need the best, brightest, most waterproof, feature rich headlamp that is also ready for any adventure no matter the conditions, reach for the Storm 450 Headlamp. The Storm 450 i is Dual-Fuel compatible, allowing you to power the light with either the rechargeable BD 1500 Li-ion battery or three standard AAA batteries.

Features

• PowerTap™ Technology allows instant adjustment between max output and dimmed power
• Patented digital lockout feature safeguards against accidental use when stored in a pack or pocket
• Dual-Fuel: Maximum flexibility to utilize either Alkaline cells or a rechargeable Lithium Ion BD 1500 battery (sold separately)
• 450 Lumen max output
• IP67: Waterproof-Tested to operate at least 1.0 meters underwater for 30 minutes
• Brightness Memory allows you to turn the light on and off at a chosen brightness without reverting back to default setting
• Settings include full strength in proximity and distance modes, dimming, strobe, red, green and blue night-vision, and lock mode
• Multifaceted optical lens design