[Touchscreen] or the [ OPEN/CLOSE] button on the Interior Unit will lock the door. Low Voltage Indicator : Refers to the state when the operating voltage of the lock is lower than the standard voltage, and activates the Low Voltage Alarm (Fur Elise) to indicate that the batteries need to be replaced. Use the Emergency Power when the batteries are completely discharged. Magnetic Sensor : Detects the opening and closing of the door. Malfunction Prevention Function (Mischief Prevention Function) : When more than 5 failed authentication attempts with unregistered PIN Codes/Cards occur, a warning sounds for 10 seconds, and the lock stops operating for 3 minutes. While lock operation is stopped, a beep is sounded every 10 seconds and the lock is activated again automatically after 3 minutes. The Malfunction Prevention function is a basic function and cannot be enabled or disabled.