The Expedition North Pole features extra-large subdials for ease of readability and better visuals in all sports situations. The second hand "sweeps" similar to a mechanical movement and is more precise for elapsed time measurement.Technically, Miyota used fine-tooth “velvet wheel” for turning of the second hand – as is traditionally used in all mechanical chronographs. 4 years of battery life resulting from technically perfect kinematic scheme with minimal friction in a big sub-dial watch finish the look.