There are two kinds of lock here: Dahua's code locks, which are opened from a keypad or with a card, and WELOCK's smart cylinders, which are swapped in place of the old cylinder without drilling the door. When choosing a cylinder the measurement is the most important piece of information, as the length is determined by the thickness of the door. Some models require a separate gateway if you want to control the lock while away from home too.
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There are two kinds of lock here: Dahua's code locks, which are opened from a keypad or with a card, and WELOCK's smart cylinders, which are swapped in place of the old cylinder without drilling the door. When choosing a cylinder the measurement is the most important piece of information, as the length is determined by the thickness of the door. Some models require a separate gateway if you want to control the lock while away from home too.