Four modes, plus BOOST, to adapt lighting to any work situation: Close-range lighting: low-intensity flood beam maximizes burn time Proximity lighting: mixed beam with brightness suited for comfortable proximity vision Lighting for movement: mixed beam includes focused lighting for moving around easily Distance vision: highly focused beam for seeing at a distance BOOST mode provides temporary maximum power of 360 lumens Safety and comfort when traveling in a group, thanks to the FACE2FACE anti-glare function: automatically dims the light when two or more beams cross, enabling those using DUO headlamps to face each other without blinding one another CONSTANT LIGHTING technology: stable lighting over time, ideal for long work periods Rechargeable in eight hours Energy gauge Removable and replaceable (available as accessory) ACCU 2 DUO Z1 charger (included) Reliability and ergonomics: Balanced, thanks to the remote battery pack worn on the back of the head Easy-to-use button, even with gloves Electronic locking to avoid accidentally turning it on during transit or storage Rugged: Excellent fall, impact and crush resistance