AD Series electronic locks from Schlage are designed to be modular and provide more options to choose from, more functionality in the lock, and more compatibility with existing access control systems. Its patented modular design allows the lock to be customized to fit the needs of an application now and changed to meet future needs without removing it from the door.To simplify installation, the AD Series combines all the hardware componentsrequired at the door for a complete access control system into one integrateddesign that includes the electrified lock, credential reader, request-to-exit, andrequest-to-enter sensors, door position switch, tamper switch, and more.