The Citizen 4220 watch movement features an Adjustable Stud Holder, providing the ability to fine-tune the balance spring for improved accuracy. It also incorporates KIF Shock Protection, which safeguards delicate components from external shocks and impacts. The movement includes a Sweep Seconds function, allowing for precise measurement of time to the nearest second. Additionally, it operates at a beat rate of 21600 vph, ensuring smooth and consistent timekeeping.