A:Answer The way this works is that you set up on your phone (1 access code, just for you). Then if you want to allow someone access to enter as much as they want, you enable it from your app on your phone, they then download the app and when they accept the invitation, they are allowed in. You can also allow someone access (say the cleaning crew) for just 1 day... and then they won't have access to open the door any more. Great idea.