The Citizen 4-S41118 is a mechanical movement equipped with a manual winding system. It features a 28,800 vibrations per hour (vph) frequency, offering precise timekeeping capabilities. The movement incorporates 21 jewels, serving to reduce friction and enhance the overall durability and longevity of the watch. Additionally, the Citizen 4-S41118 movement provides a power reserve of approximately 42 hours, ensuring reliable operation even when not constantly wound. Its compact design allows for compatibility with various watch case sizes, making it suitable for different watch styles and preferences.