Keeping it simple by providing the features you need and nothing extra the Cosmo 350 Headlamp has a max 350 lumen output, red night vision, and runs on batteries or the BD 1500 rechargeable Li-ion battery. Features: 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) 350 Lumen max output Red LED night vision has dimming and strobe modes and is quickly activated with dual-button interface Settings include dimming, strobe, red night-vision and lock mode Multifaceted optical lens design IPX8: Waterproof-Tested to operate at least 1.1 meters underwater for 30 minutes. If submerged, water may enter the battery compartment and it will still operate; it should be completely dried out after use in wet conditions Integrated battery meter display shows % of power remaining