As you have known that the door security system cannot work if there is no power. In that case, the door will not be opened. Therefore, pleaes keep one set of metal key at our security department for back up for the emergency cases. We shall seal the keys up for keeping together with your good self.
Best regards, we remain,
Clearly, I’m more worried about them sealing my good self up than about being locked out in case of power failure. Is that wrong?
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