Nest X Yale is a secure and tamper-proof smart lock that is compatible with Nest App so you will get an alert when someone tried to tamper it. If you are away and want someone to get in to your house, you can unlock it through Nest App. It allows you to create passcodes for your family members, guests or people you trust and it sends you an alert when someone unlocks or locks it. The Smart Lock also alerts you when the batteries are getting weaker so you may quickly charge them to ensure maximum security of your house or office. The gadget is compatible with Google Assistant as well, you can check status of your door, lock it from anywhere hands-free with voice command.