the smart safe opens up after you answer correctly the security question. It has a servo motor that controls the lock. Also, it has a photoresistance sensor that controls a motor that pulls the paper money inside the safe, and with the help of a built-in camera it can recognize the ticket and it will count the inserted amount for you. Otherwise, if the safe is locked you can still insert the money and the smart safe will not share with the user private information such as the previous cumulated amount of money.
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