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Worked great for a couple of months but the key cards quit working. Now my gun safe is stuck closed. I only received 2 cards, not sure which one is main card but they both used to work and now neither of them do. It will beep 3 times but that’s it. I taped the card to it in hopes to kill the battery and it unlock. Hopefully this works so I can get back into my gun closet without tearing it apart. Then I will throw the lock in the trash.