Petzl SWIFT RL PRO:- Light output: 900 lumens ; - Weight: 123g; - Technology: REACTIVE LIGHTING or STANDARD LIGHTING; - Beam pattern: mixed or focused; - Power: 2350 mAh Lithium-Ion rechargeable battery (included); - Charging time: 6h; - Certification(s): CE; - Water resistance: IPX4 (weatherproof); - Headlamp comes with an adapter for mounting on Petzl VERTEX and STRATO helmets