Petzl Actik is a powerful headlamp for outdoor activities; provides powerful and comfortable light for running, hiking or climbing; single button for quick and easy selection of light intensity and color; charging via micro USB type B port; specifications: lighting time 100 hours; afterglow 100 m; luminous flux 450 lm; lighting modes 3 clear / 2 red; source 3x AAA/LR03 alkaline, lithium, Ni-MH