Two different approaches: either swap the lock cylinder or add a reader to an existing system. The Avatto SDL series replaces a door's cylinder with a smart one — the length (60, 70, 80 or 90 mm) has to be measured off the door first, otherwise it will not fit. Ajax's touchscreen keypad and the Dahua MIFARE card reader attach to an alarm system that is already installed and let people in with a code or a card.
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Two different approaches: either swap the lock cylinder or add a reader to an existing system. The Avatto SDL series replaces a door's cylinder with a smart one — the length (60, 70, 80 or 90 mm) has to be measured off the door first, otherwise it will not fit. Ajax's touchscreen keypad and the Dahua MIFARE card reader attach to an alarm system that is already installed and let people in with a code or a card.