Black Diamond Cosmo 350 LED Headlamp - For multi-use camping， around the house， and outdoor adventures that require a simple light with both an all-purpose beam as well as night vision. This user has the need to run the lamp on alkaline batteries if caught away from a power source for a long backpacking trip. 

• Dual-Fuel: Power with three AAA Alkaline cells (included) or the rechargeable BD 1500 Li-ion battery and charger (purchased separately) for maximum flexibility
• 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
• Digital lock mode feature safeguards against accidental use when stored in a pack or pocket