When you have a dog you generally have to let them out in the back yard often.
If you don’t want to let bugs in the house and want to be alerted to the dog being back then a dog doorbell would be great.
When the dog gets within three feet of the door a sensor detects wirelessly that the dongle on the dogs color is in range and sounds an customizable alarm.
You can even sync it with your phone and can track your dog’s bathroom trips and get stats to compete with your friends! Ok maybe not the last part but you can see where I’m going.
Potentially this could be improved to add a door opener to the back door to let the dog in automatically.