Comes bundled with the Connect wifi bridge which, for users of Apple HomeKit is not necessary if one already has a HomeKit hub (Apple TV, iPad, HomePod, etc). For me the Connect bridge is useless but I can't purchase the Smart Lock Pro without it. Having the Connect bridge and trying to set up HomeKit at the same time was a real pain. I think the Connect bridge was interfering with the signal between my HomeKit hubs and the Home app.