Features of the Petzl Actik Core Headlamp Lightweight, compact and bright: 450 lumens at 75 g Two beam patterns (flood or mixed) and several white brightness levels meet the need for High-Performance lighting in dynamic outdoor activities: proximity or distance vision and rapid movement Red lighting preserves night vision and prevents members of a group from blinding each other Reflective headband for night visibility Rechargeable and easy to use CORE battery charges via micro USB port Hybrid CONCEPT design: ACTIK CORE comes with the CORE rechargeable battery and also works with three standard batteries Single button for quick and easy selection of brightness or light color Detachable, washable headband LOCK function to avoid accidentally turning it on during transit or storage Compatible with mounting accessories that allow the lamp to be attached to any kind of helmet, or to a bicycle Brightness: 450 lumens (ANSI/PLATO FL 1) Weight: 75 g Beam pattern: flood or mixed Energy: 1250 mAh CORE rechargeable battery (included) Charging time: 3 h Battery compatibility: alkaline, lithium or Ni-MH rechargeable Certification(s): CE Watertightness: IPX4 (weather-resistant)