The rechargeable IKO CORE headlamp combines multiple technologies to offer 500 lumens at only 79g. Featuring an AIRFIT headband, an ultra-thin lamp body and an energy source worn in the rear, the headlamp is balanced and comfortable enough to be imperceptible. The multiple LEDs are ideally distributed to provide uniform lighting, for optimal visual comfort. Thanks to its HYBRID CONCEPT design, IKO CORE comes with the CORE rechargeable battery and is also compatible with three AAA/LR03 batteries (not included). It is versatile: can also be worn around the neck, or transformed into a lantern, using the storage pouch. It can be flattened to reduce bulk, making it practical for all outdoor activities. Petzl - Iko Core Headlamp black