There they are verified and if the access right is valid, the cylinder knob gets released and may be operated accordingly. The app is functioning entirely offline und extends the system easyCard from WILKA, in which the lock cylinders are managed entirely by transponder cards, with additional functions and handling improvements. Features for all users: • Door opening via smartphone (time restricted or constantly) • Easily operable and customizable user interface • Live battery indicator for all lock cylinders in range Additional features for administrators: • Managing the access rights of all users • Configuring door parameters like e.g. release times • Reading the event recorder of the lock cylinders • Determining the communication key for safe data transfers