Positively surprised me that the electronic lock is not about back all deadbolt and herfährt (as I know from safes), because the electric motor is yes also fed from the batteries. In this safe rather the rotary latch is unlocked only by an electromagnet, and you can then unlock the vault manually. This saves a lot of energy in my opinion, the batteries should last long, and the emergency remains for emergencies.
The code can include up to 8 digits, and the palace shall, after a few failed attempts, forced breaks - because even brute force does not help. So if you rarely need to turn, can exploit the full security of 100 million possible combinations.
To protect vehicle Letters, spare key, passports, cash and the engagement ring in front of the quick access, the part is optimal - who has implemented the last inheritance in gold bullion and will store at home, perhaps needs some more solid.