Citizen Men's AT4028-03X Eco-Drive Limited Edition Perpetual Chrono A-T Atomic Clock Synchronization Watch Imported Eco-Drive is fueled by light so it never needs a battery Stainless steel black with black polyurethane strap and brown dial Multi-function chronograph with perpetual calendar Anti-reflective sapphire crystal Water resistant to 660 feet (200 M): suitable for recreational scuba diving