Very bright and lightweight: 900 lumens for a weight of only 100 g Optimized comfort and burn time: - Longer burn time, greater visual comfort and less manual operation with REACTIVE LIGHTING mode, which allows the light sensor to automatically adjust brightness and beam pattern, optimizing battery usage - Minimum burn time of 5 hours in REACTIVE LIGHTING mode (STANDARD level), built to power through long activities - Visual comfort enhanced by the mixed beam, which provides high-performance lighting for outdoor activities: proximity vision, movement and distance vision - Comfortable fit provided by the ergonomic adjustable headband, with two-part construction (Petzl patent) for optimal stability during dynamic activities - Reflective headband to remain visible at night - Lithium-Ion 2350 mAh battery, rechargeable via the type B micro USB port, with battery charge indicator - Ease of use, with a single button providing control of all functions: ON/OFF, lighting modes, brightness and locking