Citizen Sports Leather Watch BM8470-11EE

[Eco-Drive] Eco-Drive is Citizen's core technology, which generates power even in dark places and allows the watch to run for six months in dark places. No battery replacement required. Eco Drive eliminates the hassle and cost of regular battery changes. Inflates for over 6 months in the dark A full charge is enough to run most Eco Drive models for over 6 months in the dark.