Petzl - PIXA 3R Headlamp, 90 Lumens STANDARD LIGHTING TECHNOLOGY: beam switches to reserve mode when batteries are getting low in order to preserve remaining battery life ADJUSTABLE MODES: choose from three different modes(proximity, movement, or focused) for various situations EASY TO USE: simple push-button system for quick lighting mode selection RECHARGEABLE: no need to carry around extra batteries. Headlamp runs on a 930 mAh Lithium-Ion Polymer battery with an integrated USB port for convenient charging 90 LUMEN: maximum output