This easy to use Petzl Swift RL headlamp gives out 900 lumens of output and weighs in at an impressive 100g. Sensors on the lamp automatically adjust the brightness and beam pattern optimising battery usage.  Two beam patterns (flood or mixed) provide high performance lighting suitable for outdoor activities, proximity vision, distance vision and movement. The lamp comes complete with a reflective ergonomic adjustable headband, perfect for optimal stability during extreme activities.  A single button provides control over all functions (On/Off, Lighting modes, brightness & locking), a longer press will choose your lighting mode (Reactive or Standard Lighting). The 2350 mAh Lithium-Ion battery is rechargeable via the type B micro USB port.