The LIS ARCA 1242E with Insert for lock manufactured by Fibox is a compatible electronic locking system for interior doors. The 1242E has an insert that works with standard key-operated mechanical locks, allowing the door to be secured with a common key. The electronic part consists of an electronic card reader, control board, power supply, transformer, electric lock and door-handle. The card reader is able to recognize a variety of card types, such as magnetic, barcode, keychain and fingerprint types. The control board is used to program the electronic features of the lock. The power supply is used to ensure the door is always powered and the transformer is used to connect the 1242E to the power grid. The electric lock is used to prevent unauthorized access by controlling the mechanical lock of the door. The door-handle is included to provide a convenient means of opening the door. The LIS ARCA 1242E, therefore, provides a comprehensive and effective locking solution for securing interior doors.