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The NITECORE HC50 is a lightweight, lithium-powered headlamp featuring a 100 degree flood beam, secondary red light mode, and durable alloy construction. The HC50 features a single button 2 stage interface which ensures easy one-handed access to all modes/functions.

Features
Purpose-designed for hiking, climbing, camping and general outdoor recreation
All metal high-performance dual-beam headlamp
Aluminum "unibody" construction is highly rugged and provides excellent cooling performance
Utilizes a premium CREE XM-L2 (T6) LED
Powered by a single 18650 or 2xCR123A lithium-ion battery for up to 565 lumens of output
High-efficiency circuit provides up to 400 hours of runtime
Integrated red/green power indicator light displays remaining battery power (patented)
Power indicator secondary function displays battery voltage accurate to 0.1V
Integrated temperature sensor and intelligent temperature control ensure stable and safe use
High-efficiency regulation circuit provides unwavering output
Toughened ultra-clear mineral glass with anti-reflective coating
Constructed from aero-grade aluminum alloy
Rugged HAIII military grade hard-anodized
Comfortable chafe-free and breathable nylon headband
Waterproof in accordance with IPX-8 (two meters submersible)
Impact resistant to 1.5 meters
Tail stand capability.

36:T63a,This seller doesn't appear to be a US based company (Hong Kong or Mainland China) and won't accept the return of the headlamp they sent me even though it's been malfunctioning intermittently throughout the 10 days I've had it. The light, at times has been flickering on its highest setting even after I replaced the batteries. The seller has requested that I prove the malfunction is their fault and that I send video of the flickering. I have no idea how to prove fault, but I know that I've