UPDATED FOR 2019 The rechargeable Petzl Actik Core Headlamp has been upgraded to offer 450 lumens of power previously 350 lumens which combined with its mixed beam makes it ideal for outdoor activities like mountaineering running hiking and backpacking A HYBRID headlamp that comes with CORE a battery that is rechargeable via standard USB port it is also compatible with standard AAA batteries without the need for an adapter too making this a fantastic and versatile Petzl head torch The Petzl Actik Core has red lighting options to preserve night vision and prevents blinding other members of the group Its reflective headband helps you to be seen when a light is shone on it This headlamp is also compatible with Petzl mounting accessories not included that allow the headlamp to be attached to any kind of helmet or to a bicycle making it an incredibly versatile head torch to light up your way