Citizen Eco-Drive Watch
Make a splash with this ISO-certified watch from the Citizen Eco-Drive Promaster Diver Collection. It is fueled by light and never needs a battery, so you'll never need to open your caseback or compromise your dive again. One-way rotating elapsed-time bezel, screw-back case and screw-down crown and non-reflective crystal with poly strap.
It starts with a simple, yet revolutionary concept: a watch that never needs a battery. Citizen Eco-Drive technology harnesses the power of light-from any natural or artificial light source-and converts it into energy.