The PIXA 3 headlamp is rugged and versatile. The multi-beam adapts to all situations: close-range work, movement, and long-range vision. CONSTANT LIGHTING technology: brightness does not decrease gradually as the batteries are drained.  3 brightness levels of 20, 60 & 100 lumens.  Uses 2 AA batteries.  Can be mounted directly to Petzl helmets with the included mounted plate.  Also includes headstrap.