This 41mm Super Sea Wolf Compression features a ceramic case, blue sunray dial, STP 1-11 Swiss-made automatic movement, 44 hr power reserve, Super-LumiNova hands and markers, black rubber strap, and is water resistant to 200 meters. This watch is COSC certified. 41mm case, 20mm band width, sapphire crystal, Automatic movement with 3-hand date analog display, imported. Round stainless steel and ceramic case, with a blue dial. Black, rubber band. Water resistant up to 200m - In general, suitable for professional marine activity and serious surface water sports, but not diving.