Samsung dp728 smart lock with several mechanical keys

3. Samsung dp728 smart lock is a push-pull design smart lock with multiple door opening methods and security functions. It is equipped with 3 mechanical keys as a backup opening method for the smart lock. It can be used when the smart lock fails or the battery is low. The mechanical key can be used to unlock the door. In addition, the mechanical key can also be used as a backup opening method to deal with emergencies.