Citizen Men's BJ2135-00E Promaster Stainless Steel Eco-Drive Dive Watch Stainless steel watch with patterned bezel, rubber band, and power reserve indicator Japanese quartz movement with analog display Eco Drive technology is fueled by light and it never needs a battery Features protective mineral crystal dial window, date window, chronograph subdials, screw-down crown and pushers, unidirectional bezel, and buckle closure Water resistant to 200 m (660 ft): In general, suitable for professional marine activity and serious surface water sports, but not scuba diving.