Powered by a self-sustaining solar-powered quartz chronograph mechanism, the Helios Chronograph harnesses the sun (or other light sources) rays to generate a 6-month charge for this utility-driven timepiece. Functionally adept, designed with legibility, clarity, and proportions in mind the Helios comes equipped with a high gauge woven nylon strap in addition to the solid stainless steel bracelet that hugs the watch to the wrist.