Nucli comes to the table, or at least the door, with the Westinghouse brand and an endless array of options. It can work with iOS, Android and Windows. It can be activated by fingerprint, PIN pad (via its external touch screen), smartphone or laptop (but there’s no proximity-based unlocking yet). It supports Bluetooth, Wi-Fi and Z-Wave protocols. And you can even use any MP3 file as a doorbell. Like other smart lock/doorbell combinations, owners can use its camera to see who is at the door and open it.