The frame and strap of this headlamp are stretchy silicong. The light is easy to slip in and out of its compartment, and its integrated USB plug makes for effortless recharging, with no need for a separate cable. When using the light, you can choose a lighting mode in which a part of the output is guided into making the strap a sort of an aura of light, enhancing your visibility in traffic. - Power settings between 4 ... 250 lumen, max. range 40 meters - IP67 protected: rain, sleet or snow won't be a problem - Charging time: 4 hours - Low output reading light doubles as a battery charge indicator - In addition the red reading light saves your night vision, and doesn't attract bugs - Total weight just 60 g