The Elevator Master Access Controller, ASC2204C-H by Dahua, is designed specifically for controlling elevator access. It allows precise management of which floors users can access, enhancing building security. This controller supports up to 4 elevator control panels, integrates with various access devices, and offers features such as real-time monitoring, alarm management, and anti-passback. It's ideal for use in multi-story buildings where access control needs to be stringent and customizable.