Drive from Citizen Eco-Drive Men's Chronograph Watch with Date, AT2205-01E Imported Case diameter : 46 mm Citizen Eco-Drive is fueled by light, any light, so it never needs a battery Black ion plated stainless steel case with black accents 60 minute chronograph Drive "D" logo on crown. 12/24 hour time Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving