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 systems. Its patented modular design allows the lock to be customized to fit the needs of an application now, and can change to meet future needs without removing it from the door.Factory orderable options include choices of credential readers, chassis type,locking functions, power options, lever styles and finishes. It also offers a wideselection of features that can be configured in the field to customize your openings.