①Turn the password back to the initial password 0-0-0-0 and align it with the password line. ③ Turn the password wheel and align the four-digit number you have in mind with the password line. 4-digit combination for increased security: 4-digit password lock has 10,000 unique combinations, making it difficult to crack the code and increasing the security factor, which makes it more secure than 3-digit lock.
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