This Fortis replica has a self-winding mechanical/automatic movement, which means it will never require batteries for its entire life-span, as long as you wear it, it keeps charged with power to keep time. Its functions are day of the week, the date, 24 hour indicator, month and three subdials. It has a tough polished steel case with a diameter of 40 mm and a height of 12 mm. Its black dial and hands are protected by a mineral-crystal glass on the top as well as the bottom of the watch. It comes with a genuine leather bracelet.