PETZLA(R) ACTIKA(R) CORE HEADLAMP :: See and be seen running smarter in the powerful PetzlA(R) ActikA(R) CORE Headlamp. You'll see all that is coming your way and be easily seen by cars around you while wearing this compact, multi-beam headlamp that features 350 lumens of wide and focused beams. You'll also get the extra safety of a built-in security whistle and reflective details on the headband of this ActikA(R) Core Headlamp and enjoy convenient recharging thanks to the included CORE battery.