Nest Connect works with the Nest Secure alarm system. It keeps Nest Guard and Nest Detect connected when they're placed far apart, especially in larger homes. And with battery backup, Nest Secure stays up and running when power goes out.
The Nest x Yale Lock connects to the internet through Nest Connect. So you can use the Nest app to lock and unlock your door from anywhere, create passcodes for people you trust, and get alerts whenever someone comes and goes.