Netatmo continues to add to its line of smart home products with the announcement of this smart door lock. The lock comes with a set of three physical keys that use NFC technology to unlock the door when inserted. Lost or stolen keys can be deactivated using their app or can be configured for use in multiple Netatmo Smart Door Locks around your home or in different locations. The Smart Door Lock works via Bluetooth and runs on four AAA batteries that will power the lock for up to two years. Owners can also send invitations to guests or neighbors for lock access via email, SMS, or WhatsApp and it doesn't require a subscription or need a hub to be installed to operate.