The Citizen 4-C30170 is a mechanical watch movement that boasts a chronograph function, providing the ability to measure and display time intervals with precision. It is equipped with Incabloc shock protection, allowing it to withstand external impacts and maintain accurate timekeeping. The movement operates at a beat rate of 18,000 vibrations per hour (vph), ensuring a smooth and consistent movement of the hands. With its 17 jewels, the movement minimizes friction and enhances durability, contributing to its reliable performance.