Ultra-bright and lightweight: 900 lumens at only 100 g. Optimized comfort and burn time: - longer burn time, greater visual comfort and less manual operation with REACTIVE LIGHTING mode: the light sensor automatically adjusts brightness and beam pattern, optimizing battery usage - visual comfort, from the two beam patterns (flood or mixed) giving high-performance lighting for outdoor activities: proximity vision, movement and distance vision - comfortable wear, from the ergonomic adjustable headband with two-part construction (Petzl patent), for optimal stability during dynamic activities - reflective headband for night visibility - Lithium-Ion 2350 mAh battery, rechargeable via the type B micro USB port, with battery charge indicator Intuitive and convenient to use: - ease of use, with a single button providing control over all functions: ON/OFF, lighting modes, brightness and locking - choice of two lighting modes, selected with a long press: REACTIVE LIGHTING or STANDARD LIGHTING - LOCK function to avoid accidentally turning it on during transit or storage, or to lock lighting settings during your activity - five-level gauge for precise monitoring of the battery charge level - headlamp can be tilted upward for seeing ahead when it is worn around the neck. - detachable, washable headband Specifications Light output: 900 lumens (ANSI-FL1 STANDARD) Weight: 100 g Technology: REACTIVE LIGHTING or STANDARD LIGHTING Beam pattern: flood or mixed Energy: 2350 mAh Lithium-Ion rechargeable battery (included) Charging time: 6 h Watertightness: IPX4 (weather-resistant) Certification(s): CE