Citizen Eco-Drive Men's JR4054-56E Sailhawk Two-Tone Stainless Steel Watch Round watch featuring black unidirectional bezel and black dial with multi-function chronograph subdials and digital displays Eco-Drive is fueled by light so it never needs a battery 47 mm stainless steel case with mineral dial window Japanese quartz movement with analog display Two-tone five-link stainless steel bracelet featuring fold-over clasp with hidden double push-button closure Water resistant to 100 m (330 ft): In general, suitable for swimming and snorkeling, but not scuba diving.