Measures to defend against crime in residences are important, but everyone wants to come and go as they please. YKK AP® products support the building of safe and secure residential spaces while taking into account the convenience of the people living there. The Smart Door came into fruition to provide greater convenience and comfort in the front doors we use every day. A high-level of crime prevention is also maintained with a structure offering keyless locking and unlocking as well as a hidden keyhole. Homeowners can more effectively guard against invasive entry with remote controlled shutters to prevent burglars from breaking windows to gain entry to a property. Versions are also available that allow ventilation and natural daylight when closed.