HM50R is a rechargeable headlamp, built tough to withstand cold temperatures. It is fitted with a white light LED featuring 4 output levels. The side switch in the lamp head controls all functions and is easily operated for various lighting demands. The lamp emits a max output of 500 lumens with a max beam distance of up to 80 meters, and a max runtime of 128 hours. All of the following features: IP68 rating, cold-resistance, full-metal housing, semi-sealed holder(headlamp holder can be removed), sweat-channeling headband, compatibility with 16340 and CR123A batteries, handy and compact size, plus the ability to use the headlamp as a mini flashlight, make this multipurpose headlamp really suitable for high altitude climbing and long-distance hiking in rigid environments.