This safe comes with two user codes (user code 1 and user code 2) they are both between 4-16 digits in length. These can be changed at any time. This should not present a security risk as the combinations run into the millions and providing the codes are kept private and are not obvious like repeat numbers or birthdays there is next to no risk. Please also note three failed pin attempts will cause the safe to enter paralysis mode. This will last until a correct code is entered twice in quick succession.
John W