SmartAir is electronic opening and closing system. It operates the handle function - while closed, the handle is "separated" from locking mechnism and door can not be opened. To open the system either plastic card, chip or PIN-code can be used.
Ask for more detailed information from the sales department!
Manuals for SmartAir system:
Video guide lines available in Viking Window's Youtube'i channel - link redirects you into new web site: