The Promaster Geo Trekker utilizes Citizen’s Eco-Drive technology. Therefore, any light source can power the movement, which doesn’t require battery changes. Once set to your time zone, it’s a watch ...

and the very first Series 8 (Eco-Drive powered back then) with its distinctive eight-piece structure. 8. Exceptional Design The 1999 Independent Techno Purity takes design inspiration from the medical ...

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The purpose of eco mode, or "economical mode," is to improve your car's fuel economy as you drive. You can switch eco mode on and off by simply pressing a button that you can find near the steering ...