Indispensable for demanding tours - the Reactik by Petzl! This headlamp provides you with top-notch features and fits your head perfectly due to the adjustable headband. With up to 190 Lumen its extremely powerful and illuminates the area due to the wide light cone with a fixed component ideally - thus, its suitable for faster sports such as trail running. The headlamp offers two kinds of technologies, Constant Lightning and Reactive Lightning. While Constant Lightning makes for a even, constant light, the brightness is controlled by a special brightness sensor when Reactive Lightning is used. That way, you dont have to adjust the brightness manually and the light cone adapts to the environment youre in automatically. In addition to that, theres a Blink mode, a Red Light mode as well as three brightness levels (Max Autonomy, Standard and the super powerful Max Power mode). The latter uses 190 Lumen and is visible for 65 m. Its energy source is an integrated Lithium-ion rechargeable battery which is fully charged within 4.5 hours and stands out due to its large capacity. Optionally, you can replace it with a battery compartment (not included in delivery) if you cant recharge it anywhere on your way. Recharging it is done easily via USB. If youre looking for a powerful headlamp with a lot of features and functions, the Petzl Reactik is your best pick!