The more useful feature is being able to check whether it's shut or open, and being able to shut it remotely. Imagine that you're 30 minutes from home, driving

The more useful feature is being able to check whether it's shut or open, and being able to shut it remotely. Imagine that you're 30 minutes from home, driving to work, and panic -- did you shut it or not? Now you can check and can close it if you did forget.