The Fenix HM50R is a rechargeable headlamp, built tough to withstand cold temperatures. The Fenix HM50R has a IP68 rating, cold-resistance, full-metal housing, is compatible with 16340 and CR123A batteries, handy and compact size, plus the headlamp can be used as a mini flashlight as well, all of which make the Fenix HM50R perfect for high altitude climbing and long distance hiking in rigid environments. SPECIFICATIONS: --Utilizes Cree XM-L2 U2 cool white LED with a lifespan of 50,000 hours --Micro USB rechargeable (for 16340 batteries only) ---4 output modes --Turbo - 500 lumens (262.5 feet/80 meters) 16340 - 2.5 hours CR123 - 2 hours --High - 130 lumens 16340 - 10 hours CR123 - 14 hours --Med - 30 lumens 16340 - 24 hours CR123 - 48 hours --Low - 4 lumens 16340 - 90 hours CR123 - 128 hours --Reverse polarity protection to protect from improper battery insertion --Easy one switch operation --Can be used as a mini flashlight --Perfect for rigid environments --Sweat-channeling, reflective headband --Made of quality aluminum --Premium type III hard-anodized anti-abrasive finish --Toughened ultra-clear glass lens with anti-reflective coating --WITH CR123 - withstands temperatures down to -40º --Capable of high altitude climbing, hiking, or running in rigid environments --IP68 rating - underwater up to 6.56 feet/2 meters BATTERIES: --Included: Fenix ARB-L16 series 700mAH --Recommended Batteries: Fenix ARB-L16 series 700mAH Batteries or non-rechargeable CR123A Lithium battery *Charging with CR123A battery is prohibited* SIZE: --Length: 2.66 in./67.5mm --Width: 1.3 in./33mm --Height: 1.1 in./28mm (including the lamp holder) --Weight: 2.22 oz./63 grams (excluding battery) INCLUDED: --Fenix HM50R LED Headlamp --Spare O-ring --Spare rubber anti-dust cover --Spare silicone holder --ARB-L16-700 Li-ion battery --Charging Cable --HM50R User Manual --Warranty Card PRC