A smart door lock is an electronic lock that allows control access to a door using a smartphone, keypad, or other digital methods. It can be locked or unlocked remotely, either through an app or a code, without the need for traditional keys. Some smart door locks also include features such as biometric scanning, like fingerprint recognition. They are commonly used in homes and businesses for convenience, security, and the ability to grant or deny access to certain individuals from anywhere. Smart door locks offer more control and flexibility than regular locks.

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